Miley Cyrus says not all of her relationships have been "straight, heterosexual."

Miley Cyrus

Miley Cyrus

The 22-year-old singer - who recently split from Patrick Schwarzenegger and was once engaged to 'Hunger Games' star Liam Hemsworth - hinted she might be bisexual while launching her new Happy Hippie Foundation to help homeless and LGBT [Lesbian, Gay, Bisexual and Transgender] youth.

The 'We Can't Stop' singer didn't elaborate on her comment, according to The Washington Post, but hopes to use her provocative image to promote more important issues in the future.

She said: "No one should have to hide who they really are, no matter what his or her name, gender or status. That's why Happy Hippies are here to say that every life is valuable!

"The position I'm in, I feel like I've got a lot of power. But so many kids don't feel that way. They're under their parents' rule.

"When you have all eyes on you, what are you saying? And that's what I had to ask myself a lot. It's like, I know you're going to look at me more if my (breasts) are out, so look at me. And then I'm going to tell you about my foundation for an hour and totally hustle you."

Miley also admits she struggled with traditional gender expectations when she was younger.

She told Out magazine: "I didn't want to be a boy. I kind of wanted to be nothing. I don't relate to what people would say defines a girl or a boy, and I think that's what I had to understand: Being a girl isn't what I hate, it's the box that I get put into."

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