Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013

Lily Allen goes green for her costume at the 2013 UNICEF UK Halloween Ball held at One Mayfair on Thursday (October 31) in London, England.

The 28-year-old singer performed on stage with Robbie Williams during the evening, which raised vital funds for the organization’s work for children affected by the current Syria crisis.

All money raised for UNICEF from today – and for the next three months – will be matched pound for pound by the UK Government to help the children of Syria.

Also in attendance at the event was Runner Runner‘s Gemma Arterton.

10+ pictures inside of Lily Allen and Gemma Arterton at the ball…