Britney and Paris Hilton have always been buddies. So it's no surprise to hear the two were hanging out together at a posh party at Pailhouse in West Hollywood for a birthday party Thursday night.
Brit came as Jason Trawick's guest, who's Hilton's agent.
"Britney was shy with most of the people there," a source tells me of the intimate 20-person party, "But she and Paris hugged and talked for awhile," a source tells Eonline.com.
Brit and Jason left before midnight.