Celebrities let their creative sides come out at Kate Hudson's annual Halloween soiree on Saturday night!

Gwen Stefani looked grand as Cinderella (perfect for her blonde hair), and David Arquette went as Elvis. Appropriately, he Tweeted, "I think I really do have an urge for a peanut butter and banana sandwich." The actor posed for pics with actress Sara Foster (below.)

David was also accompanied by Dancing With The Stars pal Chaz Bono -- see what Chaz dressed as after the jump!