Billie Eilish All Bondage In Leggy Schoolgirl Miniskirt

BillieEilish/Instagram

Billie Eilish has ditched covering up and stripped down to a tartan schoolgirl miniskirt, complete with ball-and-chain bondage action and big stomping boots. The 19-year-old pop sensation, known for her baggy shorts and matching skirts, today broke the mold in a rare Instagram share showing her killer legs, with the "bad guy" singer reminding her 76.4 million followers that custom-made Gucci bagginess ain't all she wears. Kicking off with her trademark slouchy look, the teen quickly upped the ante, and Instagram is thanking her. Check it out below.

BillieEilish/Instagram

Scroll for the photos. They come as the Grammy winner releases her documentary "The World's A Little Blurry," with Eilish nonetheless choosing crystal-clear shots for her promo. The photos, racking her up a staggering 6 million+ likes in just six hours, came as artsy pro shots with a grunge finish and plenty of eccentric outfits.

Opening with her face hidden, Billie posed in an A-line black skirt, slouchy red hoodie and funky platforms with huge knotted socks, but it was very bare-legged as fans swiped right.

BillieEilish/Instagram

Seen by a black vehicle and swinging a ball and chain for a very edgy finish, Billie posed in sunlight and with her thighs out, all leg in a red tartan miniskirt and sexy black garter, also going sassy in knee-high laced-up boots and a dark hoodie. By the end of the post, the sweats were back, though.

Eilish, who boasts a sustainable fashion collection with clothing giant H&M, stuck to the planet-friendly theme as she showcased her range, admitting, however, that one item doesn't follow the green theme.

BillieEilish/Instagram

Addressing fans, the star wrote: “THE WORLD’S A LITTLE BLURRY” COLLECTION IS OUT NOW," adding:

"Everything in this line (besides the socks) are made from organic fabrics! all grown without pesticides which is better for the environment. everything is made in the USA (mostly in california) which supports our homegrown economy and saves on international shipping, meaning it’s more sustainable."

Stating that she'd like fans to reconsider their fast fashion choices in favor of something longer-lasting, Billie plugged the concept as "important" to her - it'll "last for a much longer time," she added. Scroll for the swimsuit shower!

Seeingly targeting those who might shop Insta and Fashion Nova only to throw it away after a few months, Eilish stated: "My hope is that by investing in more high quality items they will last for a much longer time, and we can all buy and consume less."

Quick to leave a like was TikTok sensation Addison Rae, although fans seemed to have made a beeline for the legs. "THE SKIRT I AM HYPERVENTILATING" currently tops comments with over 12,000 likes.

Scroll for Billie's rare bare butt cheeks showoff!