What happens to boy bands when they grow up? They become man bands, duh! There was even a popular R&B vocal group named for this process.

What happens to boy bands when they grow up? They become man bands, duh! There was even a popular R&B vocal group named for this process.

Fortunately for the man-band population, their adoring fans grow up too, and they've been turning out in volume for the NKOTBSB tour. The jaunt in question pairs once and future heartthrobs New Kids on the Block and Backstreet Boys for a trip down memory lane that will stimulate hormones you didn't know you still had.

They're even bringing along Matthew Morrison from "Glee" to whet your appetite. So grab your halter top and ditch your wedding ring, and let's do this!