Is it wrong that we love watching celebrities like Ellen DeGeneres [1], George Clooney [2], and Ashton Kutcher [3] prank other celebrities? Whether they're tricking Justin Timberlake [4] or scaring the crap out of Miley Cyrus [5], it's always fun to watch. In honor of April Fools' Day, we thought it would be appropriate to crown the No. 1 celebrity prankster of all time. Who do you think it is?