Kate Hudson was surprised with a super-secret birthday bash for her 34th recently, and a slew of celebrities showed up to help her celebrate.

Hudson’s fiance, Muse frontman Matt Bellamy, organized the party and invited several of their high-profile friends, including Leslie Mann and Judd Apatow and actress Cameron Diaz. The party was held at a friend’s home in New York City, where Hudson danced the night away with her pals.

“Kate was totally surprised,” a source said. “The party started outside, but it was freezing so people moved inside and danced.”

Hudson gave a surprise of her own last summer when she did a guest spot on “Glee” and ended up winning over the stars of the show as well as the fans.

“I’m so obsessed with her,” Lea Michele said. “She’s one of the greatest comedic actresses right now and I just think she’s so great.”