Joey McIntyre and A.J. McLean gave new meaning to "hangin' tough" when they appeared on stage in their underwear during their final NKOTBSB tour stop in London, Ontario.

A fan video shows McIntyre in a blue crop top and black boxer briefs, surprising Brian Littrell and Nick Carter during a rendition of 'Quit Playin' Games (With My Heart).' While the clip doesn't last long, it's enough for fans to catch a glimpse of the father-of-three prancing around in his skivvies.

In another video, McLean appears on stage with a shirtless Donnie Wahlberg, wearing a black top hat, a white sleeveless tee and a pair of white undies. He dances around under cascading streamers, begging the NKOTBSB for attention during 'Cover Girl.' The audience happily obliges.

McLean will get to strip down once again when he and the Backstreet Boys kick off their four-day Caribbean cruise on Dec. 2. “It’s two times the pleasure,” Littrell said. “Last time we did half of the boat. This time we’re doing the full boat, so you get two shows, two doses of games, two doses of the Backstreet Boys.”

After an impressive three months on the road, NKOTBSB wrapped their North American tour on Aug. 7.

Watch Joey McIntyre Sing 'Quit Playin' Games (With My Heart)' in His Underwear

Watch A.J. McLean Dance in His Underwear on Stage