Josephine Santos, PacificCoastNews.com
Sounds like Britney Spears had herself a very happy birthday indeed!
Birthday girl Brit was in good spirits, a source tell E! News. She was dressed sexily, in a blue velvet blazer, shorts and fishnet stockings.
She had a cake presented to her around 10 p.m., but there was no champagne toast, since no alcohol was served at the soiree, the insider tells us.
"It was really mellow," says the source.
So who was on hand to help her celebrate?