The stars came out to celebrate Bill Clinton's 65th birthday and 10 years of his Clinton Foundation last night in Hollywood. Celebrities like Jessica Alba and Sofia Vergara enjoyed performances by huge acts, including Usher, Lady Gaga, Kenny Chesney, The Edge, and Bono. For her performance, Lady Gaga decided to remake her "Bad Romance" into a "Bill Romance," and Bill, as well as Chelsea and Hillary, was clearly amused in the audience. Before she kicked off her song, Gaga said, "I am having my first Marilyn moment — I always wanted to have one. And I was hoping that it didn't involve an accident with some pills and a strand of pearls, so here we are." She went on to serenade the former pres in a nude body suit and blond bombshell wig. Check it out above and tell us how you think she compares to Marilyn in the comments.