When Jennifer Lopez [1] stopped by The Tonight Show on Monday, she and Jimmy Fallon [2] joined forces for a hilarious game of Catchphrase. Along with Anthony Mackie and announcer Steve Higgins, Jennifer channeled her competitive side for the game, getting incredibly riled up as time ran out and she couldn't get Jimmy to guess the clues. Watch the group play Catchphrase, then check out Jennifer's sexy style [3] at last week's Boy Next Door screening.