Originally formed in 1993, Backstreet Boys is widely considered one of the most critically acclaimed and commercially successful boy bands in history. Since it's founding, it has included a stable line-up consisting of co-vocalists Nick Carter, Howie Dorough, AJ McLean, Keith Richardson, and Brian Littrell. The band's first single "We've Got It Goin' On" (1995), the band's first single was a global hit and preceded successful tours in Europe and Asia. Their third album, "Millennium" (1999) became a breakthrough hit. Thesusbequent "Into the Millennium Tour" included 115 sold-out shows in 84 cities. "Black & Blue" (2000) became their second number one hit album in the US and proceeded the "Black & Blue World Tour" in 2001. Between 2010 and 2011, Backstreet Boys toured with New Kids on the Block as co-headliners on the NKOTBSB Tour. In the summer of 2025, they performed a multi-month residency at the Sphere in Las Vegas.