Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013: Photo 2983619, 2013 Halloween, Gemma Arterton, Lily Allen, Robbie Williams, Steve Coogan Photos

Lily Allen Paints Body Green for UNICEF

Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013: Photo 2983628, 2013 Halloween, Gemma Arterton, Lily Allen, Robbie Williams, Steve Coogan Photos

Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013: Photo 2983624, 2013 Halloween, Gemma Arterton, Lily Allen, Robbie Williams, Steve Coogan Photos

Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013: Photo 2983626, 2013 Halloween, Gemma Arterton, Lily Allen, Robbie Williams, Steve Coogan Photos

That's not scary! Gemma Arterton looks stunning in silver gown at UNICEF Halloween Ball, Celebrity News, Showbiz & TV

Lily Allen transforms into alien for charity

Lily Allen transforms into alien for charity

Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013: Photo 2983619, 2013 Halloween, Gemma Arterton, Lily Allen, Robbie Williams, Steve Coogan Photos

Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013: Photo 2983628, 2013 Halloween, Gemma Arterton, Lily Allen, Robbie Williams, Steve Coogan Photos

Lily Allen Paints Body Green for UNICEF's Halloween Ball 2013: Photo 2983625, 2013 Halloween, Gemma Arterton, Lily Allen, Robbie Williams, Steve Coogan Photos