Justin Bieber bared his musclebound torso as he went shirtless for a surprise performance on night one of Coachella.

The 28-year-old pop star hit the stage during R&B crooner Daniel Caesar’s set, confirming a swirl of rumors that he would treat the crowd to an appearance.

Daniel and Justin regaled the music festival crowd with a rendition of their song Peaches, which was included on Justin’s album Justice last year.

Crooner: Justin Bieber bared his musclebound torso as he went shirtless for a surprise performance on night one of Coachella

Justin was wearing a set of denim sweats that sagged low enough to reveal the hemline of his Calvin Klein underwear.

The STAY singer, who has famously underwear modeled professionally for Calvin Klein, accessorized his look with earrings and a baseball cap.

Earlier in the evening he had been spotted heading through the fairground, concealing his taut torso in a tank top and a crimson PVC jacket.

Company: The 28-year-old pop star hit the stage during R&B crooner Daniel Caesar’s set (pictured), confirming a swirl of rumors that he would treat the crowd to an appearance

Limelight: Daniel and Justin regaled the music festival crowd with a rendition of their song Peaches, which was included on Justin’s album Justice last year

Spot it: Justin was wearing a set of denim sweats that sagged low enough to reveal the hemline of his Calvin Klein underwear

On the move: Earlier in the evening he had been spotted heading through the fairground, concealing his taut torso in a tank top and a crimson PVC jacket

This year’s Coachella line-up featured a massive change as earlier this month it was announced that The Weekend alongside Swedish House Mafia would be replacing Sunday night’s headliner Kanye West.

The Weeknd and the house music group – consisting of Axwell, Steve Angello and Sebastian Ingrosso – have a working relationship as they collaborated on hit track Moth To A Flame together and also have the same management team SALXCO.

It remains unclear how the headlining gig will work meaning whether one will perform after the other or if they will be switching off but the publication’s sources said The Weeknd’s portion will likely be shorter given the time restraints to prepare for the show.