Surprise! Justin Bieber Joins Chance The Rapper Onstage At Coachella

Bieber dons a white bucket hat for a performance of 'Confident.'

Just a day after Jay Z joined former foe Nas onstage and Beyonce and Solange put on a super sisterly duet, everyone at Coachella Valley Music and Arts Festival was treated to yet another A-list cameo from Justin Bieber on Sunday (April 13).

To put an exclamation point on the first weekend, Bieber joined Chance the Rapper onstage for his afternoon set to perform their collaboration "Confident."

Wearing a white bucket hat and black tee, Bieber played hype man for his friend, moving his feet rapidly to the beat.

"That was fun," Bieber tweeted shortly after sharing a backstage shot of their performance.

Just last month, Bieber pulled another surprise at the SXSW Music Festival by showing up to manager Scooter Braun's Sunday Funday Showcase for a performance of "As Long As You Love Me," which he dedicated to "my baby" -- ahem, Selena.