Today Your source for all things celebrity and entertainment. He may jump around the stage as the frontman of Coldplay , but that's not how Chris Martin stays trim. Instead of counting calories or signing up for Weight Watchers, the 38-year-old musician just doesn't eat anything at all?for a day. "I fast once a week," the father of two told the hosts of Fresh 102.7 . Instead of eating on that day, the "Paradise" singer just drinks water.