Jason Mraz had "experiences with men" while he was dating his wife Christina Carano.
The 'I'm Yours' hitmaker questioned if he was homosexual after getting close to other guys, but after chatting about his sexuality to Christina - who the singer married in 2015 - he identifies as two-spirit, "someone who can love both man and woman".
He said: "But I've had experiences with men, even while I was dating the woman who became my wife. It was like, 'Wow, does that mean I am gay?'
"And my wife laid it out for me. She calls it 'two-spirit,' which is what the Native Americans call someone who can love both man and woman. I really like that."
Jason's supporters sparked speculation about his sexuality last month when he wrote a poem celebrating Pride Month which ended with the line: "I am bi your side."
He added to Billboard: "Honestly, I didn't realise it was going to be so telling."
In 2005, the 41-year-old singer admitted he would be keen to get up close and personal with another guy "if the right one came along".
He said at the time: "I have never been in a sexual relationship with a man. If the right one came along, then sure.
"I had a gay friend I was hanging out with just about every day. We were basically best friends. It took me about three months before I realised, 'Oh my god, we're dating.'
"Right before I moved to California he gave me a pretty strong-willed kiss goodbye, which I have never experienced before.
"Unfortunately, he had a little bit more facial hair than I like."