VIDEO : Prince William and Kate Middleton Laugh While Playing DJs

Prince William and Kate Middleton stopped by BBC Radio One on Friday to take on DJ duties as they counted down the day's official chart. "It?s Friday! 21st of April, and this is a very special official chart,? Prince William kicked things off. But, his boastful voice immediately caused Kate to burst into laughter on air. The Duchess of Cambridge quickly composed herself and chimed in saying, ?We?ll bring you all the big stories, new entries, high climbers and of course, the top 10 in full."