- Donnie joined the Backstreet Boys during the song "Get Down"
- Brian and AJ joined Joey onstage while he was singing "Please Don't Go Girl"
- The Wanted joined NKOTB on stage and performed "So Glad You Came"
- 98 Degrees joined NKOTBSB on stage and Donnie said "All is well in the boy band universe"
- NKOTB wore Backstreet Boys shirts and BSB wore New Kids shirts for the finale.
Here is a photo of New Kids on the Block, Backstreet Boys and 98 Degrees all on stage together from ATL_ChandaKing
Here are a few more videos from yikes77 from last night's show...