Justin Bieber is known for his boyish good looks, but recent ventures into the world of shirtless modeling have forced him to ramp up his exercise regimen.

According to the Daily Mail, the 21-year-old pop sensation recently told the Kyle and Jackie O Show on Kiss FM that he will be bringing a tricked-out “Gymbus” on his upcoming world tour, Purpose.

“I will be touring on a bus. It’s a different vibe, I don’t mind it. I have a studio bus and a workout bus, it’s just a big gym,” Bieber said.

While Bieber has been committed to getting shredded before his tour kicks off in March, he also told the radio hosts that he brings other buses along for his friends, as well as a quiet bus where he can get some much-needed shuteye.

“On tour it’s more lenient, I can bring friends [on tour] and party and sleep all day. It’s better,” Bieber added.

Since the first horse drawn buses were used as early as the 1820s, it’s safe to say that things have changed in the motorcoach industry, especially when you’re a global icon. Bieber brings a fleet of custom buses on each tour, though the “gymbus” is a first for the superstar.

According to The Spec, Bieber’s custom gym-on-wheels may not even be the most interesting bus that he’s bringing on tour.

The singer has always had an interest in skateboarding, appearing at several events and tournaments throughout the years. In addition to the “gymbus,” Bieber also told the radio hosts that he will be “bringing a half-pipe on tour” to practice his kickflips and ollies.

Bieber’s personal trainer, Patrick Nilsson, recently lauded the singer’s commitment to fitness, adding that he has been focused on bulking up to account for the rigorous nature of a worldwide tour.

“He has put on 20 pounds of muscle and he’s still working on it. It’s a work in progress,” Nilsson told HollywoodLife.com.

Hardcore Bieber supporters may prefer him to be toned and skinny, but the addition of a “Gymbus” to his tour almost ensures that he will come back much bulkier than fans are used to seeing.