Tiffany Haddish, Salma Hayek & Rose Byrne Pose Like Bosses in N.Y.C., Plus Beyoncé, Cardi B & More

Tiffany Haddish, Salma Hayek and Rose Byrne attend an event for their movie Like A Boss in New York City on Saturday.

JAY-Z and Beyoncé get glam for Sean "Diddy" Combs' 50th birthday party presented by Ciroc Vodka in Los Angeles on Saturday night.

Katie Holmes is all smiles at the Frederick Wildman and sons 'Wrappy Hour' event in New York City on Saturday.

Cardi B, Mary J. Blige and Offset also party at Sean Combs' 50th birthday bash presented by Ciroc Vodka in Los Angeles on Saturday night.

Chance the Rapper performs Saturday during day 1 of the Rolling Loud Festival at Banc of California Stadium in Los Angeles.

John Travolta and Olivia Newton-John are reunited in West Palm Beach, Florida, where they dressed up as their Grease characters Danny Zuko and Sandy Olsson for a movie sing-along event on Friday.

Jennifer Lopez is spotted in Miami wearing all white as she hits the gym with fiancé Alex Rodriguez on Saturday.

Taylor Swift is surprised with a giant birthday cake onstage during iHeartRadio's Z100 Jingle Ball 2019 presented by Capital One in New York City on Friday night.

The Aeronauts star Eddie Redmayne heads to lunch in New York City on Saturday.

Reese Witherspoon sports a bright smile in Los Angeles on Friday.

The singer and Voice coach celebrates on Dec. 28.

Also at the event in London on Friday night, Connie Britton.

Selena Gomez waves to fans while leaving the NRJ radio station studios on Friday in Paris.

Lea Michele struts her stuff through the streets of N.Y.C. on Friday.

Patrick Schwarzenegger cozies up to a pup on the set of Despierta América! at Univision Studios in Miami on Friday to promote the film Daniel Isn't Real.

Sally Field becomes the latest star to join Jane Fonda in her "Fire Drill Friday" climate change protests in Washington, D.C., on Friday.

Camila Cabello has layers of style on Friday during a visit to SiriusXM's Radio Andy in N.Y.C.

Wyclef Jean celebrates the launch of his new Carnival World Music Group — a publishing and distribution company that will focus on creative talent in Africa and other underserved markets — with partner and Sound Royalties’ Alex Heiche at the Core Club in N.Y.C. on Thursday.

Honorees Taylor Swift and Billie Eilish smile during their big night at Billboard’s Women in Music 2019 on Thursday in L.A.

Vin Diesel and Michelle Rodriguez accept a statuette at The Game Awards 2019 in L.A. on Thursday.

Sienna Miller and Emily Blunt attend the Gucci and Cinema Society screening of American Women at Metrograph on Thursday in N.Y.C.

Laura Dern speaks on Thursday at a screening of Marriage Story at the Hammer Museum in L.A.

Jamie Foxx steps out in a cozy sweatsuit on Thursday night in L.A.

Jeff Goldblum shows off his musical talents as guest host of The Late Late Show with James Corden on Thursday in L.A.

Creator and actor Jason Segel and Chris O’Dowd pose at the Dispatches from Elsewhere tastemaker event on Thursday in L.A.

Tony winner Idina Menzel gets into the holiday spirit on Thursday, performing songs from her new album, Christmas: A Season of Love, at a Today at Apple event at the Fifth Avenue Apple Store in New York City.

Eva Longoria supports Charlene Roxborough Konsker and Vimmia’s launch of the CRK + Vimmia Collection on Thursday in Beverly Hills.

Chris Martin talks animatedly while Hugh Grant listens during a taping of The Graham Norton Show in London on Thursday.

Andrew Scott, Phoebe Waller-Bridge and Ben Aldridge volunteer during March Fund Day at the Choose Love shop for the Help Refugees organization on Thursday in London.

Kate Hudson is all smiles while hosting a cocktail event to celebrate Happy X Nature Eco-Evening Collection in Venice, California, on Thursday.

Johnny Galecki reunites with Chevy Chase at the Academy of Motion Picture Arts and Sciences 30th anniversary screening of National Lampoon’s Christmas Vacation at the AMPAS Samuel Goldwyn theatre in Beverly Hills on Thursday.

Aaron Paul gets chatty at PaleyLive NY at Apple’s Truth Be Told screening in N.Y.C. on Thursday.

Bethenny Frankel plays in the ball pit at the Museum of Ice Cream Flagship opening party in N.Y.C. on Thursday.

Jenn Streicher and Busy Philipps get together at the Streicher Sisters and PLUS Products Celebrate STRIIIKE Holiday Market at STRIIIKE in Beverly Hills on Thursday.

And a Patridge in a pear tree! The Hills star embraced her holiday spirit with a tinsel boa at the Neutrogena Winter Soiree Party in Hollywood.

Kelly Osbourne shows of brilliant purple locks while catching a production of Nativity: The Musical with her mom, Sharon, in London on Thursday.

Jack Antonoff and Carly Rae Jepsen perform during the 6th Annual Ally Coalition Talent Show at Town Hall Theater in N.Y.C. on Thursday night.

Alicia Keys speaks onstage at the Billboard x Amex Impact Brunch on Thursday at The West Hollywood EDITION.

Saoirse Ronan and Greta Gerwig get all dressed up for the Little Women premiere at Cinema Gaumont Marignan in Paris on Thursday.

Yara Shahidi grabs the mic during the Massachusetts Conference for Women 2019 at the Boston Convention Center on Thursday.

Also taking the stage at the Massachusetts Conference for Women 2019 on Thursday, U.S. women's soccer star Megan Rapinoe.

Kendall Jenner makes her way through N.Y.C.'s SoHo neighborhood on Thursday.

Harry Styles kicks back as Spotify celebrates the launch of his new album Fine Line with a private listening session for fans on Wednesday in L.A.

Jennie Garth gets cooking on Tuesday at an event in N.Y.C. marking a new partnership between same-day delivery service Shipt and Sur La Table.

Julia Roberts and Michelle Obama embrace after an Obama Foundation event in Kuala Lumpur, Malaysia, on Thursday.

Selena Gomez shines in gold, high-waisted pants and a black top in London on Wednesday.

Keri Russell, Jimmy Fallon and Jon Hamm go up, up and away during the “Mad Lib Theater” segment on The Tonight Show Starring Jimmy Fallon on Wednesday in N.Y.C.

Lizzo looks ultra glam as she snacks on a doughnut at Q102’s Jingle Ball presented by Capital One at Wells Fargo Center on Wednesday in Philadelphia.

We know where to find these fantastic beasts! J.K. Rowling and Eddie Redmayne attend HBO’s Finding the Way Home world premiere on Wednesday in N.Y.C.

Kendall Jenner keeps cozy in a buffalo plaid Calvin Klein set at the brand’s pajama party on Wednesday in N.Y.C.

Elizabeth Hurley sits down on BuzzFeed’s AM To DM on Wednesday in N.Y.C.

David Hasselhoff reunites with KITT from Knight Rider at the gala party to celebrate his joining the cast of 9 to 5: The Musical at The Savoy Theatre in London on Wednesday.

Jordyn Woods and host Megan Thee Stallion get close at YouTube Music’s Celebration of the Fearless Women in Music at Spring Studios on Wednesday in L.A.

Post Malone takes a break while shooting the Guy Ritchie film Cash Truck — his film debut! — in L.A. on Wednesday.

Camila Cabello gets a big hug from fans on Wednesday night during a Mastercard-hosted listening party in N.Y.C. celebrating her new album, Romance.

Gerard Butler takes a phone call in L.A. on Wednesday.

Uncut Gems costars Julia Fox and Adam Sandler hit the red carpet together at the premiere of their A24 film at The Dome at ArcLight Hollywood on Wednesday.

Tyra who? Heidi Klum looks fabulous while filming Germany’s Next Top Model overseas on Wednesday.

Stella Maxwell wears an all-black ensemble to the Reformation New Year’s Eve Party at Primos in N.Y.C. on Wednesday.

John Boyega, Daisy Ridley and Oscar Isaac attend a special fan event for Star Wars: The Rise of Skywalker at Roppongi Hills in Tokyo on Wednesday.

Reese Witherspoon is joined by kids Deacon and Ava Phillippe and husband Jim Toth on Wednesday as she is honored with the Sherry Lansing Leadership Award at The Hollywood Reporter's Power 100 Women in Entertainment event at Milk Studios in Hollywood.

Also at the Power 100 event on Wednesday, Olivia Wilde and Kaitlyn Dever.

Lupita Nyong'o brings the brightness on Wednesday while out in New York City.

A$AP Rocky performs at the Ericsson Globe Arena on Wednesday in Stockholm, Sweden, back in the country for the first time since he was released from custody this summer following assault charges.

Lily Aldridge flashes the peace sign on Wednesday while making her way through N.Y.C.

Danai Gurira and America Ferrera pose for a photo before announcing nominees for the 26th Annual Screen Actors Guild Awards at Pacific Design Center in West Hollywood on Wednesday.

Millie Bobby Brown and Shaun Neff attend the 2019 WWD Beauty Inc Awards at The Rainbow Room in N.Y.C. on Wednesday.

Costars Nicole Kidman, Margot Robbie and Charlize Theron smile together on the red carpet ahead of the Bombshell premiere at Regency Village Theatre in L.A. on Tuesday.

Diane Kruger and Norman Reedus arrive at Chanel’s party to celebrate the debut of Chanel N°5 in the Snow at the Standard High Line on Tuesday in N.Y.C..

Also at Chanel’s party to celebrate the debut of Chanel N°5 in the Snow: Kacey Musgraves, who 'sleighs' her festive look.

Director Deon Taylor, Tyrese Gibson and Spike Lee stop to take a selfie at the 51st NAACP Awards FYC Screening Series Presents a Special Screening of Black and Blue at The WGA Theater on Tuesday in Beverly Hills.

Kristen Stewart skips the shirt and stuns in a pale pink skirt and jacket as well as a dangling necklace at the Audi-sponsored screening of Seberg on Tuesday in L.A.

Henry Golding, Hennessy's Prestige & Rare Cognac Collection ambassador, attends the brand’s Greatness Is an Odyssey content series premiere at the London Hotel on Tuesday in West Hollywood.

Rachael Ray cuddles up to a new furry friend from the ASPCA while taping The Rachael Ray Show on Tuesday in N.Y.C.

Paul Walter Hauser and costar Jon Hamm pose together at the Richard Jewell Atlanta screening on Tuesday at Rialto Center of the Arts in Atlanta.

Harry Styles heads down the halls of The Late Late Show with James Corden before taking his post as guest host on Tuesday in L.A.

Victoria Justice strikes an angelic pose at Naughty or Nice: A Swarovski Holiday Celebration on Tuesday in N.Y.C.

Bradley Cooper takes part in ICAP’s annual Charity Day on Tuesday in N.Y.C.

Kylie Jenner shows off her curves in hip-hugging leather pants on Tuesday night in Beverly Hills.

Adria Arjona embraces costar Mélanie Laurent at the premiere of Netflix’s 6 Underground on Tuesday at The Shed in N.Y.C.

Harrison Ford arrives in Madrid, Spain, on Tuesday to attend the COP25 climate change conference.

Bobby Cannavale and Rose Byrne step out for a rare date night at a photo call for their production of Medea at BAM on Tuesday in Brooklyn.

Hailey Baldwin keeps cozy in an oversized camel coat while out and about on Tuesday in L.A.

Tony Shalhoub and wife Brooke Adams brave the New York City rain to go under the tent at the Big Apple Circus at Lincoln Center for the 2nd Annual Cabaret at the Circus Gala for Broadway for All, an organization committed to shaping a new generation of artists, leaders and advocates who are impassioned to create inclusive work for all.

Gloria Steinem, Robin Morgan, Sarah Jones, Jane Fonda, and Jessica Neuwirth take a selfie during the Sisterhood Is Global Institute (SIGI) 35th Anniversary Celebration at Apella in New York City on Tuesday.

Jeff Nichols and Richard Linklater host a special screening of Terrence Malick’s A Hidden Life at AFS Cinema on Tuesday in Austin, Texas.

Tiffany Haddish lets the cameras know how she really feels while filming The Last O.G. in Brooklyn on Tuesday.

Matthew McConaughey and Hugh Grant snap a selfie at The Gentlemen photo call on Tuesday night in London.

Kevin Hart shows his cement-covered hands at his hand and footprint ceremony at Grauman's Chinese Theatre in Hollywood on Tuesday.

Newly crowned Miss Universe Zozibini Tunzi, Miss South Africa, visits the top of the Empire State Building on Tuesday in N.Y.C.

Elton John performs on stage during his Farewell Yellow Brick Road tour stop at Rod Laver Arena in Melbourne, Australia, on Tuesday.

Dita Von Teese attends the David Jones Luxury Beauty and Designer Accessories Floor Launch at the David Jones Elizabeth Street Store in Sydney on Tuesday.

Alicia Vikander and her mother, actress Maria Fahl Vikander, attend a private screening of Into the Blue by artist Irene Petrafesa at A&D Gallery in London on Tuesday.

Sienna Miller and Lucas Zwirner step out for a hand-in-hand Tuesday morning stroll with their pup in New York City.