Cute picture of Gwen Stefani’s boys at a birthday party for Christina Aguilera’s  son Max.

It’s hard to tell in this picture, but they are in a firetruck and Elmo was there somewhere.

It looks like a good time was had by all at Katy Perry’s Willa Wonka themed 25th birthday party this weekend. It also appears that the romance is still going hot and heavy between Katy and Russell Brand. Party guests revealed that Russell was catering to his new sweetheart’s every whim on her special night.

Katy had asked all her guests to dress in white for the Charlie and the Chocolate Factory-themed party but did not tell them they would be doused with neon paint before the night was over. She wore a low-cut, tight sequinned white dress to the event, and had her nails painted with the faces of Oompa Loompas. The bash was held at restaurant The Beach On Sunset in West Hollywood on Saturday night and it was transformed into Willy Wonka’s factory.

A-list party guests included Taylor Swift and P. Diddy…who probably wondered why Katy was jacking his whole ‘white party’ thing.

Jennifer Aniston and John Mayer found a quieter way to hook-up this weekend as they both attended the first birthday party for Sacha Baron Cohen and Isla Fisher’s daughter, Olive. Last week Jen was forced to asked local police officers for help as she headed over to Mayer the Players house for a booty call.

Jen, who made birthday headlines earlier this week when she celebrated on-off-on beau John Mayer’s 31st, arrived at Isla’s Hollywood Hills home hiding on the floor of the backseat of BFF Courtney Cox and David Arquette’s car.

Oddly, Baby Olive sure does have a lot of famous grown-up friends. Other party guest were Dustin Hoffman, Ben Stiller, Ellen DeGeneres and Portia, Jack Black, Tobey Maquire, Kate Beckinsale and Jonah Hill. They must do things different in L.A. Where I come from the party is usually about the kid, not the parents Hollywood connections. But whatever, party on Borat!