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I can’t believe Ellen DeGeneres is 50!

Ellen had a big birthday bash on Saturday night to celebrate her 50th birthday.  Her party was on Warner Bros. lot.  No press were allowed, but she will be showing some clips from her birthday on her show.

Ellen knows how to party and invited about 600 friends! Among well-wishers were newlyweds Mariah Carey and Nick Cannon, Janet Jackson, theJonas Brothers, Tom Hanks and Rita Wilson, Allison Janney, T.R. Knight, Ray Romano, Joely Fisher, Gwen Stefani and Gavin Rossdale, Paris and Nicky Hilton with their boyfriends Benji Madden and David Katzenberg and, of course, DeGeneres’ girlfriend, Portia de Rossi.

Pink performed three acoustic numbers, including Janis Joplin’s “Me and Bobby McGee,” Samantha Ronson (Lindsay Lohan’s rumored girlfriend) deejayed and there was a fireworks display. The menu included sushi from Sushi Roku, Pinkberry and Fry Girl doughnuts.