Robert Pattinson Pictures at Chateau Marmont

Robert Pattinson made a low-key exit from the Chateau Marmont in LA last night. He wrapped up a long evening out on the town that started with winning the choice vampire honor at the Teen Choice Awards! He took the opportunity on stage to speak about a new charitable initiative called Cancer Bites, which aims to raise money to help fight the disease. Unfortunately, Kristen Stewart wasn't able to join in on Rob's celebrations. She's abroad working on her next movie, as is Rob's best pal Tom Sturridge. Tom's in their home city of London, where he was spotted last week hanging out with his own lady love, Sienna Miller.