NSYNC was a band.
Justin Timberlake . In the late 1990s , Timberlake rose to prominence as one of the two lead vocalists and youngest member of NSYNC , which eventually became one of the best-selling boy bands of all time . NSYNC . NSYNC consisted of Justin Timberlake , JC Chasez , Chris Kirkpatrick , Joey Fatone , and Lance Bass .