Singer Billie Eilish fired back at what she sees as an unfair focus on women's physiques.

"Nobody ever says a thing about men's bodies. If you're muscular, cool. If you're not, cool. If you're rail thin, cool," she fumed about what she thinks is a double standard between the sexes when it comes to body image, reports aceshowbiz.com.

Billie, who has fronted the cover of Variety magazine's "Power of Women" issue, added: "If you have a dad bod, cool. If you're pudgy, love it! Everybody's happy with it. You know why? Because girls are nice. They don't give a f*** because we see people for who they are!"

The singer also said despite knowing she has always had "bog b**bs" she has "never felt like a woman."?

The Grammy-winner added she doesn't feel "feminine" or "desirable" and has to train her brain to believe she is a "pretty girl."

Billie said: "I've never felt like a woman, to be honest with you. I've never felt desirable. I've never felt feminine. I have to convince myself that I'm, like, a pretty girl. I identify as 'she/her' and things like that, but I've never really felt like a girl."

The 'Your Power' singer has become renowned for wearing baggy clothes and said she hated it when people suddenly "sexualised" her when she changed her trademark look and showed off skin.

The singer said: "I wasn't trying to have people not sexualise me. But I didn't want people to have access to my body, even visually. I wasn't strong enough and secure enough to show it. If I had shown it at that time, I would have been completely devastated if people had said anything."

"Maybe my not really caring about being sexualised is because I've never felt desired or desirable," she added.

Billie?said: "I have big boobs. I've had big boobs since I was nine years old, and that's just the way I am."

"That's how I look. You wear something that's at all revealing, and everyone's like, 'Oh, but you didn't want people to sexualise you?' … I'm literally a being that is sexual sometimes.”