Sonic Youth frontman Thurston Moore married Kim Gordon, the band's bassist, in 1984, three years after the band formed. They had daughter Coco Hayley 10 years later, but last October, they called it quits on their relationship and quite possibly the band. "Oh no!" said Sonic Youth fans in unison. No worries. Coco, had her own punk band, Big Nils, to pick up right where her parents left off.