Justin Bieber made a surprise appearance at Coachella on Sunday as he joined palChance The Rapper on stage during his set (April 13).

Biebs joined the rapper on stage in Indio, California to perform their hit, Confident.

The singer hinted to fans about his whereabouts before hitting the stage.

"What am i up to today?? ;)", he teased fans on hisTwitterpage.

what am i up to today?? ;)

— Justin Bieber (@justinbieber) April 13, 2014

"That was fun", he later tweeted.

But he wasn't the only surprise act that the weekend had to offer.

Beyoncé surprised fans on Saturday by showing up on stage during sister Solange's set.

Although not part of the official line-up, Bey joined her sister on stage during her performance of Losing You.

The superstar siblings wowed fans with a synchronised dance routine.

Queen Bgave her little sister a quick hug before leaving her to perform the rest of her set.