Tuesday night, September 19th, Britney Spears decided to blow off some steam by hitting up Hollywood hotspots with Avril Lavigne!!! Britney arrived at Winston's at 11:30 with some other new friends, but an X17 inside source says once inside, Britney met up with Avril, cousin Alli Sims and Brandon Davis. After staying only about an hour, Britney and crew left and went to Hyde.