In the summer of 1995, after befriending Chris Kirkpatrick, a fellow Universal Studios stage performer who was singing in a doo-wop group, he became the fourth member of NSYNC, along with Justin Timberlake and JC Chasez. Then Lance Bass was added to the group that would become NSYNC. In 2001, Fatone co-starred with *NSYNC bandmate Lance Bass in the Miramax film "On the Line", he guest starred with NSYNC on a 2001 episode of "The Simpsons" episode New Kids on the Blecch, and also did voice work with Bass on the same episodes of Disney's "Kim Possible" and Adult Swim's "Robot Chicken".