The annual CNN Heroes: An All-Star Tribute event, which honors those making differences in their communities and around the globe, filled LA's Shrine Auditorium with plenty of stars last night. Emma Roberts was on hand to present in a short black Maria Lucia Hohan dress while Sofia Vergara chose dark hued Dolce & Gabbana and Brooklyn Decker went with a metallic Christian Dior number. Miley Cyrus, who performed “The Climb,” arrived in a revealing yellow Roberto Cavalli gown with boyfriend Liam Hemsworth by her side. They weren't the only famous faces to show their support at the event since AnnaLynne McCord, Mary-Louise Parker, Christy Turlington, and others also came out for the show. CNN's own Anderson Cooper has since returned to NYC, but did his part by hosting the evening and wowing a few celebrities like Emma, who twittered that meeting him backstage was a dream come true.