Here's a hint... she's a singer, always has a poker face on and was out and about in London, UK, hitting up the club scene last night.

Find out who's wearing those kickass stilettos after THE JUMP!!

If you guessed Lady GaGa, then you're right! Here was snapped by the paps on a night out hittin' up the Groucho Club and Bungalow 8.

Bauer-Griffin