We have good news for European pop fans. Backstreet's back, alright -- and they're bringing New Kids on the Block.

Backstreet Boys and New Kids on the Block, collectively known as NKOTBSB, released a trailer for their spring European tour. The tour takes off in Belfast, Ireland on April 20 and ends May 13 in Malmo, Sweden, hitting Dublin, Denmark, and numerous U.K. cities in between.

The tour follows the massive success of the supergroup's North American tour this summer and upcoming winter cruise, and will be a great way to promote their mashup album. Fans will jump at the chance to see two of the biggest boy bands in history reunite, and they won't be disappointed by the high-energy performances. Both groups would do well to perform their classics, though, as the Backstreet Boys' latest single, 'Lost in Space', underwhelmed audiences.

Fan club members can snag presale tickets, including VIP packages, starting Thursday, Oct. 27. Tickets go on sale for the general public on Friday, Oct. 28.

NKOTBSB European Tour Dates:

4/20/12 Belfast, U.K. | Odyssey Arena
4/21/12 Dublin, Ireland | O2 Dublin
4/23/12 Liverpool, U.K. | Echo Arena
4/24/12 Manchester, U.K. | MEN Arena Manchester
4/26/12 Newcastle, U.K. | Newcastle Arena
4/27/12 Birmingham, U.K. | LG Arena Birmingham
4/28/12 London, U.K. | O2 Arena
5/12/12 Herning, Denmark | Jyske Bank Boxen
5/13/12 Malmo, Sweden | Malmo Arena

Watch the NKOTBSB European Tour Trailer