Did a martian land on Earth and party with Londontown's star-studded crowd? LOLz!
Lily Allen, or should we say Lily Alien, stepped out in all green on Thursday for Halloween and for a good cause!
The singer attended the 2013 UNICEF UK Halloween Ball in London and performed with Robbie Williams to raise money for the children of Syria!
The singer seemed to have a fun night! She even ran into her uncle?
We are unsure if Karl Lagerfeld approves of your Halloween costume, Lils.
But then again, he doesn't really smile often.
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[Image via WENN.]
Tags: children, fun, gifs, halloween, halloween costume, karl lagerfeld, lily allen, london, robbie williams, singer, twitter, uk, unicef