Backstreet Boys — the four-man onetime boy-band sensation will be performing at the Halifax Metro Centre this summer. It was confirmed yesterday the group will appear on Aug. 2 as part of a tour of Eastern Canada. The group – which broke music and concert sales when it broke on the scene 15 years ago – released its sixth album, Unbreakable, last year. Tickets to see Nick Carter, Brian Littrell, Howie Dorough and A.J. McLean – Kevin Richardson left the group – are $64.50. They go on sale Saturday at 9 a.m. Call Ticket Atlantic at 451-1221 or go online to