Kim Kardashian isn't the only one going topless in a new music video!
The Backstreet Boys are back, showing some skin in their latest offering for "Show 'Em (What You're Made Of)".
Both Brian Littrell and AJ McLean lose their shirts in the new clip -- and, we gotta say, 38-year-old Littrell still looks pretty buff!
Nick Carter, Kevin Richardson and Howie Dorough all opted to keep their tees and tank tops on for the emotional video, which was released last night.
The song is the boy band's second single from their new album, "In a World Like This," which was released back in July.
How do you think the guys have held up through the years? See more former Teen Idols in the gallery below!