OneRepublic

OneRepublic hit the main stage with six of their hits, including "Secrets," "Good Life" and "Counting Stars."

A Great Big World and Christina Aguilera

Christina Aguilera (and her baby bump) joined A Great Big World for their megahit "Say Something." The pop superstar was running late, missing her cue and leaving poor Ian Axel to attempt banter with the crowd for a painful few minutes. The wait was worth it, as the performers delivered a powerhouse rendition of the heartfelt song.

B.o.b.

B.o.B. offered up a laundry list of groove-worthy tunes, including "Magic," "Headband" and "So Good." Though Paramore's Hayley Williams didn't join him on stage, the rapper did get an assist from the audience on "Airplanes."

Ariana Grande

Ariana Grande brought backup dancers to her quick set, comprised of "Right There," "The Way," and "Problems" feat. Iggy Azalea. The duo obviously color coordinated for the day, killin' it in eye-popping black and white ensembles.

Iggy Azalea

After lending a hand on Grande's "Problems," Azalea returned to the main stage in "Fancy" form.

Maroon 5

Adam Levine's new 'do caught fans by surprise Saturday night, prompting some memorable hashtags to float across the jumbo screen. As fans feverishly texted and tweeted #WangoTango, hoping to see their message up on the screen, one fan wrote of Levine's blond hair: "#QuestionableDecisions #EyebrowsDontMatch #WhyAreYouBlond?" Another fan simply wrote, "Adam take off ur shirt."

Calvin Harris

Calvin Harris brought a little "Summer" to the Wango Tango festivities.

Paramore

Simply put: Paramore rocked the house down. Lead singer Williams brought one teen on stage, handing over her own mic on the "Misery Business" bridge, and later asked the audience if it was anyone's first time at a Paramore show. "Welcome! You're in," she told the cheering fans. "And you're never getting out." The rockers also played "Ain't It Fun," "The Only Exception" and "Into You."

Zedd

If there was any question about EDM's place in mainstream radio, Wango Tango has fully embraced the movement. Zedd and Harris were also joined on the main stage by The Chainsmokers (of "#Selfie" fame) and later, Tiesto.

Shakira

Celebrating mother's day, Shakira commanded the stage in a shredded white tee, jeweled necklace and jeans. While she had plenty of hits in her arsenal, The Voice coach opted for a less-than-memorable five-song set.

Ed Sheeran

KIIS saved the best for (almost) last with Ed Sheeran. The feisty Brit took the stage all by his lonesome, with just a guitar and a loop station to perform "Lego House," "I See Fire," "A Team" and "Sing." On the latter, Sheeran led the audience in an 18,000 person sing-a-long and asked them to keep on singing all the way til Tiesto's performance.

Tiesto

Tiesto closed the night with a bang.