Here are some news articles about the upcoming New Kids on the Block and Backstreet Boys joint tour in Europe.
Stereoboard.com: Pop Supergroup NKOTBSB Announce 2012 UK & Ireland Tour Dates & Tickets
Wharf.co.uk: New Kids On The Block reunite for O2 show
Entertainment Focus: NKOTBSB Announce European Tour Dates
Entertainment.ie: New Kids On The Block and Backstreet Boys for Irish dates
We Are Pop Slags: Backstreet Boys’ Howie D talks to WAPS about going solo + new NKOTBSB tour!
NKOTBSB at LG Arena (Has ticket prices)