A mix of celebrities and famous professional athletes celebrate the Sports Spectacular 28th Anniversary Gala; Vince Vaughn, Andy Samberg, Sarah Silverman and other comedians bring laughs to "The Big Live Comedy Event" for YouTube Comedy Week; Ginnifer Goodwin, Malin Akerman, Christa B. Allen and other network stars light up the Disney Upfronts; Hailee Steinfeld and Diablo Cody among others attend The Magic Bracelet premiere; Ozzy Osbourne, Natasha Bedingfield and Kathy Girffin entertain the crowd at an event for the L.A. Gay & Lesbian Center; Chord Overstreet and Rumer Willis game it up at the Donkey Kong Island Pool Party—get caught up on L.A.'s busy weekend in this installment of Last Night's Parties.