AceShowbiz - Billie Eilish hit out at those who judge her body having "never seen" it as she shed her famously oversized clothes for a video on her new tour.

The 18-year-old singer is known for her love of boxy tops and loose-fitting trousers, which always conceal her figure. But as she kicked off her "Where Do We Go? Tour" at Miami's American Airlines Arena on Monday night, March 9, Billie seized the opportunity to showcase a different side of herself.

In an interlude between songs, audience members were shown a clip of the teenager slowly undressing - removing her shirt to eventually stand in just her bra.

The video, which was shared on Twitter by concertgoers, was accompanied by a voiceover by Billie, in which she mused about why people are so judgmental of her figure.

"You have opinions, about my opinions, about my music, about my clothes, about my body," she began. "Some people hate what I wear, some people praise it, some people use it to shame others, some people use it to shame me. But I feel you watching, always, and nothing I do goes unseen.

"So while I feel your stares, your disapproval, or your sigh of relief, if I lived by them, I'd never be able to move."

Asking if fans wanted her to be "smaller, weaker, softer, taller", Billie continued: "The body I was born with is it not what you wanted? If I wear what is comfortable, I am not a woman. If I shed the layers, I'm a s**t. Though you've never seen my body, you still judge it, and judge me for it - why?"

Concluding, Billie said: "We make assumptions about people, based on their size. we decide who they are, we decide what they're worth. If I wear more, if I wear less, who decides what that makes me? What that means? Is my value based only on your perception? Or is your opinion of me not my responsibility?"