Kelly Clarkson surprised fans with an impromptu performance during a morning coffee run. Tech entrepreneur Arjun Rai of SelfTact tells ET that Clarkson walked into the Blue Bottle in Culver City, California, on Wednesday morning with five to six performers who serenaded the crowd for 90 seconds.«She was energetic and enthusiastic» while singing, Rai said. «Music started playing out of nowhere.