New Kids on the Block & Backstreet Boys (NKOTBSB Tour) June 7, 2011

New Kids on the Block and Backstreet Boys -- two heartthrob vocal groups that ruled the '80s and '90s, respectively -- will join forces for a summer 2011 arena tour.

The groups announced plans for the " NKOTBSB" tour this morning on Ryan Seacrest's radio show. So far, five cities are confirmed for the run -- Toronto; Uniondale, NY; East Rutherford, NJ; Rosemont, IL; and Los Angeles. Tickets go on sale beginning Nov. 19.