Last Night's Parties: Lady Gaga, Bono Sing For Bill Clinton; Justin Timberlake Gets An Award For Being Green; Jennifer Aniston, Justin Theroux Toast Robert Downey Jr. & More!

The Clinton Foundation's "A Decade Of Difference" Gala

Lady Gaga has her "first real Marilyn Monroe moment" as she serenades former President Clinton with her hit "Bad Bill Romance." [via] Where: The Hollywood Bowl Who Was There: Antonio Villaraigosa, Benji Madden, Black Eyed Peas, Cash Warren, Chevy Chase, David Foster, Erin Foster, Felicity Huffman, Fergie, Geena Davis, James Denton, Jane Fonda, Jayni Chase, Jessica Alba, Joel Madden, John Kassir, Josh Duhamel, Julia Ormond, Julie Benz, Lily Collins, Maria Bello, Michelle Kwan, Mira Sorvino, Patricia Arquette, Paul Pierce, Petra Nemcova, Rachel Zoe, Reza Jarrahy, Richard Perry, Rosanna Arquette, Sofia Vergara, Stevie Nicks, Sugar Ray, Sugar Ray Leonard, Tracy Anderson, William H. Macy, Zach Braff. Other Details: Saturday night, an all-star lineup of musical acts took the stage for "A Decade of Difference" 10th anniversary celebration of the William J. Clinton Foundation, Bill Clinton's foundation to alleviate poverty, improve global health, strengthen economies, and protect the environment. The night included performances by Lady Gaga, Usher, Kenny Chesney, and U2's Bono and The Egde for the star-studded crowd. Gaga even told the crowd she was having her "first real Marilyn Monroe moment" as she serenaded the former president with a rendition of "Happy Birthday" for his belated 65th and performed an alternate version of her hit "Bad Romance" to him with "Bill Romance." This made Bill Clinton very nervous, especially (we're guessing) since Hillary was sitting next to him as Gaga thrust her pelvis no more than a few feet away from his face at eye-level. And no, I do not have any idea what the hell Jessica Alba is wearing, sorry.  [Jessica Alba, Stevie Nicks photo via]