George Clooney knows how hard it can be on set and, as a movie lead, feels it's his responsibility to lift morale when the going gets tough.In fact, in the past, he's confessed to busting out Sugar Hill Gang hits between scenes. Is he still singing the hip-hop group's numbers?"I do still sing them every once in a while to entertain the troops," says the 54-year-old. "They think, 'Gosh. We're in the water. It's cold. We're shooting 14 hours. It's terrible. What could be worse?' And...
