The Yeah Yeah Yeahs will release their fourth album, “Mosquito,” next week. And with it comes a new look from the band’s chameleon of a front woman Karen O. For one, she’s now blonde. And she’s into crystal-encrusted Elvis Presley style suits, the latest in a long line of wonderfully weird stage outfits designed by her bestie, the designer Christian Joy. We look back at some of our favorites (fishnets! zigzags! giant headdresses!) from Yeah Yeah Yeahs gigs past.