Who knew Bruno Mars was so hilarious? The singer teamed up with Ellen DeGeneres during an appearance on the Ellen show for another one of her funny pranks. As usual, Ellen had Bruno wear an earpiece so that she could tell him what to say, and he pretended he didn't feel well when a nurse was sent to his dressing room. Somehow, Bruno managed to keep a straight face as things got weirder and weirder, and Ellen was on a roll when she had him brag about his Super Bowl performance, insist he hadn't swallowed in weeks, and ponder the design of tortilla chips. Watch the hilarious prank above.