Let's be real: You love "Fancy" because of Charli, not Iggy. It's the XCX hook that's stuck in your head. Same goes for Icona Pop's "I Love It." We've been championing the 22-year-old London songstress from the get-go, and her recent album Sucker proves that she's has some endlessly catchy electro-pop up her sleeve. Onstage she exudes untortured confidence, gyrating her hips in a PG-rated style with irresistible synth goodness. Holychild opens the show.