George Clooney belts out "Sweet Caroline" with Neil Diamond for Jane Fonda, Stacy Keibler and Nicky Hilton; Brian Grazer is honored by the Alfred Mann Foundation; Dita Von Teese, Marisa Tomei and Kristin Davis fete Cameron Silver's new fashion tome at Chateau Marmont; Jon Hamm, Anna Faris, Jeremy Renner and others attend the Reel Stories, Real Lives fundraiser; Travis Barker, Hugh Hefner and Brody Jenner help Snoop celebrate his birthday at the Playboy Mansion—it was quite the weekend here in L.A. and we have the rundown on the biggest and best events that went down in this edition of Last Night's Parties.