Australian boyband 5 Seconds of Summer (5SOS) had a cheeky band practice. Lead vocalist Luke Hemmings posted a nude photo of him and drummer Ashton Irwin during rehearsal.

Hemmings posted the photo on Twitter on Tuesday, showing his naked backside while holding a guitar. Irwin is facing the camera, and it appears he is also as naked as Hemmings, with only his guitar protecting his modesty. However, upon closer inspection, it’s apparent that he is wearing short pants.

“rehearsal was getting boring,” Hemmings captioned the photo.

The naughty photo is perhaps the guys’ way of showing their support to bassist Calum Hood, who made headlines in August after a full frontal Snapshat video of him went viral.

Hood, 18, sent the video showing his penis to a fan, who uploaded it to the video-sharing service Vine. The short clip expectedly became viral, prompting Hood to admit that it was really him in the video even though his face wasn’t visible.

Least ya know what it looks like now

— Calum Hood (@Calum5SOS) August 29, 2014

I'm still just a teenage kid learning from mistakes :) — Calum Hood (@Calum5SOS) August 29, 2014

Getting naked isn’t new to the Australian lads. Earlier in August, Hood, Hemmings, Irwin and Michael Clifford accepted their surfboard trophy for Breakout Group and Choice Summer: Music Group at the 2014 Teen Choice Awards wearing only towels.

“Thank you to Teen Choice Awards for letting us record this video. And basically thank you to every single fan that’s ever done anything at all for us,” 5SOS said in the video.

“We love you guys so much, and basically we are on tour at the moment in the shower.”

Accepting their award in towels isn’t that bad, but what viewers really noticed was Irwin’s rather awkward hard-on, which he addressed on Twitter.

Apparently I had a boner in the acceptance video...