A-list stars like Hilary Swank, Katy Perry and Amy Adams attended the Vanity Fair Oscar Party hosted by Graydon Carter at the Sunset Tower Hotel on March 7, 2010, in West Hollywood, California. Showing lots of skin, the stars stepped out in their best dresses, proving that the switch from red carpet dress to evening dress went more smoothly for some than it did for others. See PopEater's picks for the best dressed at the Oscar's after-party. >>