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Happy Ending - The second and final weekend of the Coachella Valley Music and Arts Festival came to a memorable end Sunday (April 20). The two week event closed out with bigger crowds and smoother sets from Pharrell, Solange, Nas, Jay Z and more. Keep reading for the highlights.(Photo: Chelsea Lauren/WireImage)

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Change Clothes - If Pharell's first set of friends was impressive during his opening show at Coachella, he sure knew how to keep the crowd interested with the rest of his guest list. Jay Z made another surprise appearance, this time on stage with Skateboard P to perform from their catalog of hits together including "I Just Wanna Love U (Give It to Me)," "Frontin'" and "Excuse Me Miss."(Photo: Christopher Polk/Getty Images for Coachella)

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Yeah! - Usher also joined Pharrell's final set. He belted out his P-written "U Don't Have to Call." (Photo: Christopher Polk/Getty Images for Coachella)

Photo By Photo: Christopher Polk/Getty Images for Coachella

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Clear Lines - T.I. was the first of Pharrell's second-week guests. He joined P to perform their massive summer single, "Blurred Lines," and it clearly rocked the crowd.(Photo: C Flanigan/FilmMagic)

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Crown - Hip hop's royal couple didn't just come to Coachella to work, Beyoncé and Jay stuck around to kick it on festival grounds.(Photo: ROBIN HARPER/Iam.Beyonce.com via Tumblr)

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Growth Spurt - Kid Cudi opted for a longer shirt and a lot more friends for his final Coachella performance. He went in on "Red Eye" with Haim and brought out MGMT for "Pursuit of Happiness" and King Chip for "Just What I Am."(Photo: Frazer Harrison/Getty Images for Coachella)

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Soaring Solo - Solange Knowles went into her second-week show with an even bigger crowd than her first, and serenaded fans with renditions of her beloved songs like "T.O.N.Y.," 'Locked in Closets" and "Lovers in the Parking Lot." (Photo: Katie Stratton/Getty Images for Coachella)

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Who's World Is This? - To celebrate 20 years of Illmatic, Nas treated fans to a performance of the entire collection during his last set at Coachella and brought out special guests like Lauryn Hill and Damian Marley to support. (Photo: C Flanigan/FilmMagic)

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From NY to Cali - Beyoncé posted this flick online of her hubby, Hov, and the God's Son Nas just outside of a trailer on the Coachella 2014 grounds. Jay Z surprised fans with a guest appearance during Nas's set.(Photo: ROBIN HARPER/Iam.Beyonce.com via Tumblr)

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Back in the Loop - After a bit of social-media grumbling following their first official reunion earlier in the festival, OutKast regrouped, stripped down their set list, and delivered a rocking performance to help close out the final weekend.(Photo: Christopher Polk/Getty Images for Coachella)

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Week One Was Epic - The Coachella Valley Music and Arts Festival kicked-off on Friday (April 11) in Indio, Calif., with a host of killer performances and surprises from some of your favorite artists. The turn out was huge as usual, as were the surprises: Pharrell and his parade of guests, Solange and Beyoncé's awesome dance-off, as well as Nas and Jay Z performing together. Keep reading for more highlights from week one of Coachella. — Dominique Zonyeé (@DominiqueZonyee)(Photo: Christopher Polk/Getty Images for Coachella)

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Rap Gods - Although Nas and Jay Z squashed their beef in 2005 with a live performance of "Dead Presidents II," no one expected Hov to hit the stage with God's Son on Saturday night. After the Queensbridge MC performed Illmatic in its entirety, Jay joined him on stage and the legends once again delivered a rendition of "Dead Presidents II" along with "Where I'm From."(Photo: Frazer Harrison/Getty Images for Coachella)

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Desert Storm - Nas is already having an epic year, so why not shut down Coachella with epic performances? We already told you he brought out Hov, but Esco shocked the audience yet again when another one of his former frenemies, Diddy, hit the stage with him as well.  It was all love when Diddy and Nas performed "Hate Me Now."(Photo: Christopher Polk/Getty Images for Coachella)

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ATLiens Have Landed - More than 10 years later, Big Boi and André 3000 of OutKast still have it! The Southern duo hit the stage Friday night with a high-energy set, marking the first stop of their reunion tour. OutKast performed hits from 2000s Stankonia era, like "BOB (Bombs Over Baghdad)," and other classics such as "Hey Ya" and "Ghetto Musick." Their hour-and-a-half long show also came with some surprise guests: Janelle Monáe, Future and Sleepy Brown.  (Photo: Jeff Kravitz/FilmMagic)

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Sister Act - What's Coachella without two surprise performances from the Carters? Before Jay teamed up with Nas, Beyoncé came out to support her sister, Solange. The Knowles girls took us back to Texas with a duo dance-off while Solo performed her True single "Losing You." Although Bey didn’t sing, watching her crash Sol-Angel's finale was enough to get the crowd hype. (Photo: Christopher Polk/Getty Images for Coachella)

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Solo Star - Beyoncé and Solange's sister action was the perfect end to Solo's set, but before Bey came on stage, Solo was holding it down all on her own. She blessed the audience with a cover of Kate Bush's 1985 classic "Cloudbusting." But she couldn't leave the stage without singing her own jams "Lovers in the Parking Lot" and the retro-soul adventure "Sandcastle Disco."(Photo: Imeh Akpanudosen/Getty Images for Coachella)

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Skateboard P and Friends - Pharrell may have had the most guest appearances during a Coachella set ever. The “Happy” singer fought off the wind on Saturday night as he performed a slew of his hits, including “Get Lucky" and "Blurred Lines” — but that was expected. It was when he shared the stage with special guests to perform hits he created for them that brought his set to another level. Pharrell and his iconic hat performed alongside Nelly for "Hot in Herre" and Tyler, the Creator even hit the stage for N.E.R.D's "Lapdance." (Photo: Frazer Harrison/Getty Images for Coachella)

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Girl Talk - As if his new Broken Ankles EP with Philadelphia Freeway wasn't enough, Girl Talk, aka Gregg Gillis, brought out the heat with Juicy J, Busta Rhymes, E-40 and Too $hort for his 45-minute, beat-driven set of mash-ups. The fellas performed clips from their respective hits "Blow the Whistle," "Bandz a Make Her Dance," "Look at Me Now" and "Tell Me When to Go."(Photo: Kevin Winter/Getty Images for Coachella)

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Hollaback Girl Is Back - Pharrell has an arsenal of hits, so he couldn't just stop with Nelly and Tyler, the Creator. The rapper/singer/producer brought out "Orange County Girl" Gwen Stefani for a performance of their hit "Hollaback Girl," which reminded the crowd why Skateboard P is so dope.(Photo: Christopher Polk/Getty Images for Coachella)

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Jhené and the Drake Surprise - Collaborations were definitely the theme for Coachella week one. California native Jhené Aiko hit the stage to perform hits from her Sail Out EP. "The Worst" singer also gave fans an unexpected SNL flashback when Drizzy Drake made his Coachella debut as the pair performed the Nothing Was the Same hit "From Time."(Photo: Imeh Akpanudosen/Getty Images for Coachella)

Photo By Photo: Imeh Akpanudosen/Getty Images for Coachella

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Trill Drama - Coachella is known for groundbreaking moments, so it was no shock when Harlem rapper A$AP Rocky and his Mob took the stage during A$AP Ferg’s afternoon set to debut Rocky’s new song. The new material caught everyone’s attention as Rocky threw shots at the popular clothing line BeenTrill. Rocky rapped: "I ain't f­­­--kin' with that Been Trill, swear s--t is booty like Tip Drill, I ain’t really into throwin' shots, but these mother---kers better gimmie props."(Photo: Frazer Harrison/Getty Images for Coachella)

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Confident the Rapper - Chance the Rapper closed out Coachella week one on day three with a stellar performance. The Chi-town rapper took it back with his overall jumpsuit and baseball cap for his Sunday afternoon performance.  (Photo: Kevin Winter/Getty Images for Coachella)

Photo By Photo: Kevin Wint

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Belieb and You Will Achieve - We ran down some of the biggest surprises yet, but this one takes the cake. Chance the Rapper sent social media into a frenzy when he brought out Justin Bieber midway into his set. The young artists had a blast on stage performing their "Confident" collabo as Biebs and his bucket hat channeled Michael Jackson with his killer spin moves. (Photo: Kevin Winter/Getty Images for Coachella)