Katy Perry, Steve Martin, Rachel Maddow join Hammer celebration

A veritable A-list of artists, actors, fashion designers and business leaders streamed into the Hammer Museum in Westwood Saturday to celebrate artists Barbara Kruger and Cindy Sherman, raising a record $2 million for the museums exhibitions and programs.

MSNBCs Rachel Maddow and actor/author/musician Steve Martin delivered the nights tributes. As if their talks werent entertaining enough, the finale came courtesy of Katy Perry, who has a busy week in store with performances planned at Sunday's fundraiser for President Obamaand at Thursday's amfAR Inspiration Gala.

"Hello everyone," Perry said, Im just going to have a little fun -- thats all -- with you," before launching into a dynamic five-song set beginning with "Part of Me" and ending with her hit "Firework."

The impressive turnout included Tom Hanks and Rita Wilson, Susan and Leonard Nimoy, Will Ferrell and Viveca Paulin Ferrell, Tom Ford and Richard Buckley, Dana Delany, John C. Reilly, Julie Bowen, Marg Helgenberger,