20-year-old English indietronica star-in-the-making Charli XCX was banging her head like Beyonce at the Superbowl on Friday, skipping across the stage scantily clad in a plaid and camouflage school-girl's uniform, belting out razor-sharp melodies in loud, smoky bellow over a sleek, synth-pop sheen and a propulsive live drummer. "I want to know who's taken any drugs this weekend," Charli polled the criminally modest-in-size crowd, to inevitable cheers. "This song's about E, so this one's for you," she continued, introducing the gritty, dance-floor-ready "Take My Hand." The tent went into full roof-raise when the singer busted into "I Love It," the almost disgustingly catchy hit she had with Swedish electro duo Icona Pop. If Charli XCX continues to win over crowds with her hooks and stadium-suited gestures, she could follow the path of Boston synth-pop college favorites Passion Pit, who had a breakout with their 2009 first-day tent slot, in the middle of a rainstorm.