David Cook finds solace in his girlfriend, fellow “American Idol” contestant Kimberly Caldwell. “I think she just gets that this is all nuts,” Cook told People magazine. “She’s a nice break from the chaos.” Caldwell finished seventh place in Season 2 of “Idol” and also has a singing career of her own. But no duets are planned for the “American Idol” winner and his girlfriend. “No, we don’t” sing together, Cook said.