Justin Timberlake headed back to summer camp on Tuesday (16Dec14) as part of a surprise comedy sketch on America's The Tonight Show Starring Jimmy Fallon. The pop superstar joined host Fallon and donned curly wigs and braces to play nerdy students at the fictional Camp Winnipesaukee, where they broke into song in the middle of the night, singing Third Eye Blind's 1998 hit Jumper. The old pals previously debuted their camp buddies skit last year (13), when they had fun with renditions of Toto's Africa and Hootie and the Blowfish's Only Want to Be with You.