To quote Usher: Oh. My. God. The American Music Awards got a blast from boy band past tonight when the Backstreet Boys took the stage with New Kids on the Block, forming one powerful, parenthetical song title-loving group called NKOTBSB. (The two groups are slated to tour together next summer. Squee!) They sang some of their greatest hits during the well-choreographed performance: Backstreet’s “Everybody (Backstreet’s Back),” “I Want It That Way,” and “Larger Than Life,” and New Kids’ “Step By Step,” and “You Got It (The Right Stuff.)” The two groups clearly rehearsed more than any other artist who took the stage tonight, and the audience, in turn, loved it. Anyone old enough to be a child/teen/music lover of the 1990s could be seen mouthing along to most of the lyrics. (Watch the performance after the jump.)

‘Fess up: Who’s ready to buy tour tickets?