NSYNC was an American boy band formed by Chris Kirkpatrick in Orlando, Florida, in 1995. The five band members were Justin Timberlake, JC Chasez, Chris Kirkpatrick, Joey Fatone, and Lance Bass. Their self-titled debut album was successfully released to European countries in 1997, and later debuted in the U.S. market with the single "I Want You Back". The group's second album, No Strings Attached (2000), sold over one million copies in one day and 2.4 million copies in one week, which was a record for over fifteen years. NSYNC's first two studio albums were both certified Diamond by the Recording Industry Association of America (RIAA). Celebrity (2001) debuted with 1.8 million copies in its first week in the US. Singles such as "Girlfriend", "Pop" and "Gone" reached the top 10 in several international charts, with the last being a US Billboard Hot 100 number one. NSYNC last recorded new material in 2002 before undergoing an indefinite hiatus.