14 Surprise Coachella 2014 Performers: Beyoncé, Justin Bieber, Gwen Stefani & 10 More Photos

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Coachella 2014's headliners were only...

Coachella 2014's headliners were only part of the story: just as buzzy were the many surprise performances by stars including Beyonce, Justin Bieber, Gwen Stefani, Slash, Jay Z, Diddy and more.

Justin Bieber shocks the crowd when he appears onstage with Chance the Rapper and performs "Confident" during day 3 of the 2014 Coachella Valley Music & Arts Festival at the Empire Polo Club on April 13, 2014 in Indio, California.

COACHELLA 2014: FULL COVERAGE

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Beyoncé surprises fans when she join...

Beyoncé surprises fans when she joins sister Solange onstage at Coachella Valley Music & Arts Festival on Saturday night, dancing together to "Losing You."

COACHELLA 2014: FULL COVERAGE

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Slash makes a guest appearance with M...

Slash makes a guest appearance with Motorhead on the Mojave stage, April 13, at the Coachella Valley Music and Arts Festival. Slash jumps into "Ace of Spades" with the band during the Sunday night performance.

COACHELLA 2014: FULL COVERAGE

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Outkast headlines the first night of ...

Outkast headlines the first night of Coachella Valley Music and Arts Festival after a seven-year hiatus. Special guest Janelle Monáe joins Andre 3000 and Big Boi during "Tightrope" on Friday night.

COACHELLA 2014: FULL COVERAGE

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Pharrell brings out Gwen Stefani for ...

Pharrell brings out Gwen Stefani for "Hollaback Girl" during his star-studded Coachella set on April 12th in Indio, California.

COACHELLA 2014: FULL COVERAGE

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Jay Z takes the stage alongside Nas, ...

Jay Z takes the stage alongside Nas, on Day 2 of Coachella in Indio, California. They paired up for "Dead Presidents II" and "Where I'm From," off Jay's 'In My Lifetime, Vol. 1.'

COACHELLA 2014: FULL COVERAGE

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Arcade Fire closes the first weekend ...

Arcade Fire closes the first weekend of Coachella Valley Music and Arts Festival on Sunday (April 13) with a special guest, Blondie's Debbie Harry. She joins the band to perform Blondie’s 1979 single ‘Heart of Glass’, sharing vocals with Régine Chassagne. On ‘Sprawl II (Mountains Beyond Mountains)’ Harry also provides backing vocals.

COACHELLA 2014: FULL COVERAGE

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Busta Rhymes and Too $hort takes the ...

Busta Rhymes and Too $hort takes the stage with Girl Talk on Friday night (April 11) at the Coachella Valley Music & Arts Festival in Indio, California.

COACHELLA 2014: FULL COVERAGE

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British duo Disclosure brings out the...

British duo Disclosure brings out the R&B legend Mary J. Blige for "F for You" during day 3 of Coachella (April 13).

COACHELLA 2014: FULL COVERAGE

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Pharell's April 12 Coachella set is l...

Pharell's April 12 Coachella set is loaded with guests including an appearance from Snoop Dogg performing "Drop It Like It's Hot." Coachella Valley Music & Arts Festival takes place in Indio, California.

COACHELLA 2014: FULL COVERAGE

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Jhene Aiko brings out Childish Gambin...

Jhene Aiko brings out Childish Gambino to perform their single "Bed Peace" at the Gobi tent on during day 3 of the 2014 Coachella Valley Music & Arts Festival in Indio, California. Drake also made a special appearance during Aiko's set for their collaborative "Nothing Was the Same" track, "From Time."

COACHELLA 2014: FULL COVERAGE

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For the Atlanta duo’s first perform...

For the Atlanta duo’s first performance together in nearly a decade, Outkast brings out surprise guests at the Coachella Reunion. Future debuts his "Honest" collaborative track with Andre 3000, "Benz Friendz" on April 11 in Indio, California.

COACHELLA 2014: FULL COVERAGE

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Sean Combs joins Nas onstage for his ...

Sean Combs joins Nas onstage for his 1999 single "Hate Me Now" on Saturday, April 12 at Coachella in Indio, California.

COACHELLA 2014: FULL COVERAGE