A Night of Too Many Stars 2012 | Pictures

Tina Fey and Amy Poehler teamed up or Saturday's Night of Too Many Stars benefit in NYC. The event's organized to benefit research for a cure for autism, and is annually hosted by The Daily Show's Jon Stewart. Jon was able to get other famous friends to attend, including Ben Stiller, Tommy Hilfiger, and Louis C.K. Seth Rogen also made a cameo with wife Lauren Miller on his arm, and Katy Perry did a duet with a young fan. The small girl, who is autistic, played the piano to accompany Katy in a rendition of "Firework." Katy was touched to be a part of the charitable evening, tweeting yesterday, "I will never forget last night. It was the most important moment thus far of what I do." Other highlights from the show included two women who paid $36,000 to hang out with Tina and Amy for one night.