The actress has been in London fulfilling promotional duties for her new film, The Mortal Instruments: City Of Bones, and, after a full day of work that started with an interview on Daybreak and finished with a meet and greet at the Apple store on Regent Street, Lily was ready to party.
She showed off her washboard abs again in a black tee crop top, which she paired with high-waisted leather trousers, black platform pumps, and a leopard-print clutch.
So what's with all the flesh-flashing? Well, she does have to see her recent ex-beau - and co-star - Jamie Campbell Bower at almost every work event. And it's never a bad thing to let them see what they're missing, is it?
We're crushing on Lily's cool style. Check out more of her looks below: