We can always count on Billie Eilish to bring the seriously unexpected – but still truly FAB – looks to the red carpet.

The 21-year-old singer-songwriter is renowned for her unique sense of style, that has seen her rock everything from a bedazzled beekeeper headpiece with a full Burberry check co-ord to the 2019 AMAs, all the way through to *that* see-through goth glam dress for this year’s Met Gala.

Hell, she even wore her actual PJs complete with a matching sleep mask and duvet on the red carpet once! All this to say that Billie ain’t afraid to experiment, even when all the world’s eyes are on her…

Which is how she ended up attending the third Annual Academy Museum Gala in Los Angeles last night channeling an aesthetic that can only be described as “sexy librarian chic”.

Yep, while the rest of Hollywood’s glitterati went full glam in the likes of polka-dot ballgowns (Kaia Gerber), *very* see-through black lace dresses (Addison Rae and Dua Lipa) and various sequinned, red satin and snow-white festive looks (basically everyone else), Billie put her own stamp on red carpet dressing in a pinstriped two-piece.

Taylor Hill – Getty Images

The unique brown striped ensemble is a design by Jean Paul Gaultier, consisting of a blazer with a plunging neckline, worn with nothing underneath (or, by the looks of it, a *serious* push-up bra), and a matching maxi skirt. And to really drive the librarian aesthetic home, Billie completed the look with a pair of round reading glasses and a silk headscarf. Iconic, much?!

Rodin Eckenroth/GA – Getty Images
We’re loving her newly-dyed bright red roots too, and those gigantic Jessica McCormack diamond necklaces… Not to mention the gold grills she so proudly flashed on the red carpet. Billie really is as unique and fab as they come.