George Clooney accepted the Brass Ring Award for his humanitarian work in Sudan at the 26th Anniversary Carousel of Hope Ball this weekend, which was presented by Mercedes-Benz and raised $2.5 million for the Barbara Davis Center for Childhood Diabetes. “It's pretty amazing," Clooney told reporters of the cause. "I think it’s important for everyone to give back.” Singers Babyface and American Idol alum Jessica Sanchez serenaded the crowd, which also included Dancing With the Stars pro Cheryl Burke (in Amit Gt), judge Carrie Ann Inaba (in David Meister), Carmen Electra (in Olcay Gulsen), Julianne Hough (in Jenny Packham) and Jennie Garth (in Toujouri). However, it was Neil Diamond's set that brought Jane Fonda, Stacy Keibler (in Monique Lhuillier), and Clooney to their feet. The crooner even convinced the honoree to finish his hit "Sweet Caroline"—after some red wine liquid courage. Encore! See more photos from this week's biggest parties in the gallery.