Watch 5 Seconds of Summer Strip Down 'Hey Everybody' on 'Conan'

Pop-punk outfit delivers acoustic rendition of exuberant 'Sounds Good Feels Good' single

Australian pop-punk upstarts and Rolling Stone cover stars 5 Seconds of Summer graced the Conan stage Monday and performed an acoustic version of their Sounds Good Feels Good single, "Hey Everybody."

Despite the stripped-down instrumentals, 5 Seconds of Summer delivered the infectious cut with the requisite attitude and angst, cruising through the chorus with an impressive wave of four-part harmonies. Not even the confines of their stools could keep guitarists Luke Hemmings and Michael Clifford from trying a few rock kicks as they brought the song to a close.

The band released Sounds Good Feels Good, their second LP, in October and will embark on an extensive world tour in February. The group will trek through Asia and Europe before their North American leg begins July 1st at the Mohegan Sun Arena in Uncasville, Connecticut.

In just a few years, 5 Seconds of Summer have catapulted from YouTube hits to arena rock stars thanks to legions of fans, a co-sign from One Direction and collaborations with pop-punk stalwarts like Good Charlotte's Benji and Joel Madden, Sum 41's Deryck Whibley and Goldfinger's John Feldmann.

"I never in a million years would have said they would be on the cover of Rolling Stone in two years," Feldmann told Rolling Stone. "I had so many fucking people say that 'guitars are over. They are over. It's all EDM and programming. And that's what people wanna hear.' And thank God, they proved them all wrong."