There's no party like an Ellen DeGeneres party, ho, ho!

El turned the big 5-0 back in January, but threw a huge b-day celebration, along with girlfriend Portia de Rossi, on Saturday night. The talk show host decked out the Warner Bros. lot with carnival rides and casino tables, as superstar guests rode the carousel, the ferris wheel, took their shot at the dunk tank, and played craps and poker.

The guest list read like a "Who's Hot in Hollywood" with newlyweds Mariah Carey and Nick Cannon showing up to join the likes of Tom Hanks and Rita Wilson, a pregnant Gwen Stefani and Gavin Rossdale, Janet Jackson, Jennifer Love Hewitt, Matthew Perry, The Jonas Brothers, Lauren Graham, Ray Romano, Courteney Cox and David Arquette, David Spade, Paris and Nicky Hilton (and their men), and many more!

My girl Pink provided the night's entertainment, putting on a mini-concert, while Lindsay Lohan's girlfriend, Samantha Ronson played DJ.

Ellen will be showing clips of the festivities on her show this Friday, and you don't want to miss it. How fun does that sound?