SINGAPORE - American boyband Backstreet Boys' upcoming concert here has been selling fast, with most of the tickets snapped up within the first hour of their release.

As soon as online ticket sales opened to the public at 10am on Friday (Sept 8) morning, fans found themselves in a queue system on the Sports Hub Tix web site. By 10.40am, most of the coveted Category 1 tickets ($248) in front of the stage were snapped up, with the majority of the Category 2 ($208) tickets behind them sold out as well.

As of 2.30pm on Friday, a limited number of Category 6 ($248) tickets, which are close to the stage but have restricted views, are still available.

Backstreet Boys - made up of AJ McLean, Howie D., Nick Carter, Kevin Richardson, and Brian Littrell - will be performing at the National Stadium on Oct 21, as part of the entertainment line-up at the WTA Finals tennis tournament.

This will be the only Asian stop for the American group, one of the bestselling boybands of all time, who have just come off a successful run of shows in Las Vegas.

The band were last in Singapore for a sold-out show at The Star Theatre in 2015.