One of the most popular boy bands of all time, NSYNC formed in 1995 with members Justin Timberlake, Chris Kirkpatrick, Joey Fatone, Lance Bass, and JC Chasez. Unknown by many, the group initially had success in Europe before breaking into the American market. Their first album wasn't as successful as they had hoped, but by the time their second album was released in 2000, they were on the top of the world. In fact, No Strings Attached was the top-selling album of 2000. In 2002, the band went on a hiatus, and hasn't recorded music or toured together since. There are no hard feelings though — phew.