The Backstreet Boys premiered a new music video for the song Show 'Em (What You're Made Of) via Facebook on Tuesday and it's clear the band members have kept in shape.

In the video, Nick Carter, Howie Dorough, Brian Littrell, A. J. McLean, and Kevin Richardson, flaunt their muscles while wearing tanks. Litrell, 38, even go shirtless showing off his toned abs.

Many fans noticed their good looks and left comments under the Facebook video.

"The older they get, the hotter they get as well!" wrote one.

"Brian is well yummy and nick is getting more gorgeous too with age love them all tho," commented another.

Aside from showcasing their physique, the members also belt a powerful message to listeners.

VIDEO: The Backstreet Boys Comeback Single In A World Like This

"When walls starts to close in, your heart is frozen over. Just show 'em what you're made of. When sunlight is fading, the world will be waiting for you. Just show 'em what you're made of," they sing.

Along with the video they also attached a message on Facebook: "This song is very personal and special to us. We hope you love it as much as we do."

The empowering ballad appears on the band's eighth album In A World Like This, which was released in July.

"I hope [fans are] going to be pleasantly surprised with the sound that we've been able to keep there with our signature harmonies and melodies and great hooks, and once again modernize our sound over the years," Dorough told The Huffington Post in April. "It's just a bunch of great pop songs with a lot of great hooks."