At his headlining show at the O.C. Fair last night, Adam Lambert lit up the stage with his flawless voice and fabulous, theatrical wardrobe—and his audience wasn't too shabby, either! We snapped some pics of all the Glambert fans outside the Pacific Amphitheater, and it appears Adam's music hits pretty much every demographic: we spotted teens, tots and grown-ups of both sexes, not to mention both the modestly dressed and the flamboyantly costumed. Flip through our gallery of Lambert's lovely fans, and find out why they love the Idol alum so much.