NKOTBSB is a compilation album by American supergroup NKOTBSB, which consists of New Kids on the Block and Backstreet Boys. The album was released on May 24, 2011, and features five hits from each group, two new joint recordings "All in My Head" and "Don't Turn Out the Lights", as well as a mash up. The album debuted at number seven in the US, selling 40,000 in the first week of its release. The album coincides with the joint tour featuring the groups, starting at the Allstate Arena in Rosemont, Illinois on May 25, 2011. The album was granted a Silver certification in UK.

New Kids on the Block is an American boy band from Dorchester, Massachusetts. The band consists of brothers Jonathan and Jordan Knight, Joey McIntyre, Donnie Wahlberg, and Danny Wood. New Kids on the Block enjoyed success in the late 1980s and early 1990s and have sold more than 80 million records worldwide, and are often credited for paving the way for future boy bands such as Take That, Backstreet Boys and NSYNC. They won two American Music Awards in 1990 for Favorite Pop/Rock Band, Duo, or Group and Favorite Pop/Rock Album. In 1991, they performed the halftime show at Super Bowl XXV, a first for a popular music group.