A weird but interesting mix of performers at this year's Wireless Festival in London's Hyde Park: Battles, Bruno Mars, Yuck, Black Eyed Peas, Rocky Erickson, Tinie Tempah, Ke$ha, the Hives, Janelle Monae, Grace Jones, the Chemical Brothers, and the Horrors all performed, and those were just the bands that didn't include any cast members of Gossip Girl. (Nice boots, Taylor ...