Justin Bieber makes surprise appearance with Chance the Rapper at Coachella

Justin Bieber surprised fans at the Coachella Music Festival as he joined pal Chance The Rapper during his set on Sunday (13Apr14).

The troubled pop star took a break from recording new music in Miami, Florida to hit the desert of Indio, California for the annual event.

During the MC's gig, he invited the 20 year old onstage to perform Bieber's track Confident, on which Chance is featured.

Following the set, Bieber took to Twitter.com and wrote, "That was fun", before posting a behind-the-scenes video of him showing off his dance moves in front of the crowd.

Bieber is just one of the stars who made unexpected appearances at the festival over the weekend (begs11Apr14). Beyonce joined sister Solange for a dance break during her performance of Losing You, Jay Z rapped alongside former rival Nas to celebrate the 20th anniversary of his debut album Illmatic, while Pharrell Williams brought Gwen Stefani onstage to sing Hollaback Girl during his set, marking her first return to the stage since giving birth to her third son in February (14).