The June 2 concert by New Kids on the Block at Verizon Wireless Amphitheatre has been canceled due to production delays. Tickets purchased online or via phone will be refunded automatically starting May 12. Tickets purchased at the box office or at Blockbuster stores can be refunded at point of purchase starting on May 13.
I would guess they canceled them because the band was just here last year for a concert which may have led to poor ticket sales, but "production delays" is the official reason.