Lifelong friendships are forged at Camp Winnipesaukee! Justin Timberlake made a surprise appearance on NBC’s Tonight Show Tuesday, joining Jimmy Fallon in a sketch about two nerdy campers in 1997. The bit started with Fallon inviting his curly-haired BFF to play a game of truth or dare. Timberlake asked “Is it weird that it’s just two boys?” before picking truth. Fallon asked “Truth or dare: do you have a crush on anyone?” The sheepish singer confessed “Yeah,” Fallon asked him “Who is it?” And Timberlake said: “Kimmy Gibbler from Full House!” earning him an air-five. Timberlake and Fallon had a ball and wrapped it up with a chorus duet from “Jumper.”