Clinton Becomes Little Monster For Lady Gaga

Lady Gaga relished in her "Marilyn moment" on Saturday night at the Hollywood Bowl for A Decade of Difference: A Concert Celebrating 10 Years of the William J. Clinton Foundation.

Changing the lyrics of mega-hit Bad Romance to Bill Romance, she serenaded the former president. She also altered the words of You and I to Billary and I, giving the Clinton's a morphed name. After high energy routines, the out-of-breath singer returned to her piano atop a treehouse structure, where she fake-flashed the audience and dropped the F-bomb.

President Clinton was quickly converted into a Little Monster, admitting he nearly had a "heart attack" after her "Marilyn moment" comment. The event was to honor his 65th birthday, but Gaga neglected to sing Happy Birthday Mr. President to mark the occasion. Disappointingly, Clinton didn't showcase his musical talents on the saxophone.

ET correspondent Christina McLarty exclusively spoke to Usher before the show about the impact of President Clinton. He sincerely "looks up to" this historic figure and recalled meeting him for the first time at a New Years Eve party at the White House.

Not only was this a mega-sized birthday party, but "I think it's the birth of a celebration that will happen again," Usher predicted. President Clinton has so much influence, he personally requested two of the three songs Usher performed in the show. He opened his set with the inspirational With a Little Help from My Friends before breaking into his hits Yeah and O-M-G.

With a roaring welcome from the crowd, surprise presenter Ashton Kutcher said, "Empowering people is at the core of the Clinton Global Initiative's work around the world and right here in the United States." The packed house of 10,000 was also ambushed when Stevie Wonder opened the event.

There was a very cute couple moment during Bono and The Edge's performance. President Clinton had his arm around Hillary and Chelsea's husband Marc Mezvinsky embraced his wife as they swayed to the music. Then Chelsea sat on her hubby's lap for the remainder of the set.

The former First Daughter took the mic, praising her dad in a moving speech. She called both of her parents her heroes and said her father gives "other Gaga's their American dreams."

Kenny Chesney, K'naan, and Juanes also performed. Additional presenters included Ellen DeGeneres, Jason Segal, Maria Bello, Colin Farrell, and Laura Ling. Jane Fonda, Barbra Streisand, Zack Galifianakis, Lindsay Lohan, Maria Shriver, David Spade, and publicist Howard Bragman were also present to take in the show and support the cause. All proceeds went to benefit the Clinton Foundation.