New Kids On The Block and Backstreet Boys perform at Mohegan Sun Arena on June 2, 2011 in Uncasville, Connecticut. From left to right are Donnie Wahlberg, A.J. McLean, Jordan Knight, Howie Dorough, Joey McIntyre, Brian Littrell, Jonathan Knight, Nick Carter and Danny Wood. (Getty Images) more pics » Nick Carter (Getty Images) The Backstreet Boys have been churning out catchy pop tunes for close ...