[6]During the summer of 2010, the Backstreet Boys joined New Kids on the Block onstage at the Radio City Music Hall (as a part of NKOTB Casi-NO Tour), where the groups performed "I Want It That Way".

[7] Since the performance, the media began to circulate rumors of the two uniting for a tour in the summer of 2011.

[8] The tour was officially announced on On Air with Ryan Seacrest during an interview, where it was mentioned the groups were recording a single to be later released.

[9] The groups also performed at the 38th Annual American Music Awards to give the public a taste of what they would see on the tour.

[10] For an interview on Entertainment Tonight, Donnie Wahlberg held a picture of the proposed staging, which featured a standard concert stage with an extended catwalk leading to a circular platform.