No Doubt drummer Adrian Young, raving about the surprise appearance by the Killers on the second night of KROQ's annual "Almost Acoustic" Christmas show at the Gibson Amphitheatre in Universal City, Calif. "I'm going to get my drink and head out to see them," the rocker told us, backstage, before rocking out to the band's four-song set. Backstage after their show, lead singer Brandon Flowers, in a red flannel shirt and toting an American Apparel bag, posed for pictures with radio staffers. Also in the audience: Michelle Trachtenberg and October Road star Bryan Greenberg.