iHeartRadio Music Festival Highlights 2014

Nicki Minaj, Usher, Chris Brown plus more surprises.

The Best of the Weekend's Performances - The fourth annual iHeartRadio Music Festival went down this weekend (Sept. 19-20) at the MGM Grand in Las Vegas for two days of amazing shows from some of the top artists in the game. Host Ryan Seacrest welcomed it all, from Nicki Minaj?s bootylicous ?Anaconda? performance, to her a capella rendition of her verse on Beyonc??s ?Flawless,? a nicely choreographed ?Starships? sing-a-long, and her ?Bang, Bang? surprise from a cat ears-donning Ariana Grande. Keep reading for more festival highlights from the epic weekend. ?Dominique Zonye? (@DominiqueZonyee)(Photo: Ethan Miller/Getty Images for iHeartMedia)

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The Best of the Weekend's Performances - The fourth annual iHeartRadio Music Festival went down this weekend (Sept. 19-20) at the MGM Grand in Las Vegas for two days of amazing shows from some of the top artists in the game. Host Ryan Seacrest welcomed it all, from Nicki Minaj’s bootylicous “Anaconda” performance, to her a capella rendition of her verse on Beyoncé’s “Flawless,” a nicely choreographed “Starships” sing-a-long, and her “Bang, Bang” surprise from a cat ears-donning Ariana Grande. Keep reading for more festival highlights from the epic weekend. —Dominique Zonyeé (@DominiqueZonyee)(Photo: Ethan Miller/Getty Images for iHeartMedia)

The Closer - Usher proved why he is still considered one of the best entertainers in the game after more than two decades in when he closed the festival on Friday night. The R&B veteran delivered his usual mesmorizing dance moves, teasing concertgoers for his UR Experience tour with performances of his new hits "She Came to Give It to You" and "Good Kisser.?(Photo: Ethan Miller/Getty Images for iHeartMedia)

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The Closer - Usher proved why he is still considered one of the best entertainers in the game after more than two decades in when he closed the festival on Friday night. The R&B veteran delivered his usual mesmorizing dance moves, teasing concertgoers for his UR Experience tour with performances of his new hits "She Came to Give It to You" and "Good Kisser.”(Photo: Ethan Miller/Getty Images for iHeartMedia)

Hot as Fire - When Breezy was asked who'd win a dance off between him and Usher, he said that he would (we'd say that's too close to call), but a little friendly competition and encouragement never hurt anybody! The two R&B titans joined forces at the 2014 iHeartRadio concert in September when Ursh invited the youngin' to join him onstage for "New Flame." A dance-off happened, and it was a draw!  (Photo: Kevin Winter/Getty Images for iHeartMedia)

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Epic Dance Off - Just when you thought, ‘Damn, Usher can’t get any better,’ he invited special guest Chris Brown on stage for a dance off during their performance of Breezy’s hit “New Flame,” which also features Rick Ross.(Photo: Kevin Winter/Getty Images for iHeartMedia)

The Black Widow - Fresh from the Festival Village stage Iggy Azalea got ?Fancy? with the iHeartRadio crowd. She even delivered her verse on Rita Ora?s ?Black Widow.?(Photo: Kevin Winter/Getty Images for iHeartMedia)

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The Black Widow - Fresh from the Festival Village stage Iggy Azalea got “Fancy” with the iHeartRadio crowd. She even delivered her verse on Rita Ora’s “Black Widow.”(Photo: Kevin Winter/Getty Images for iHeartMedia)

G-G-G-G-Unit - 50 Cent held it down in the name of hip hop on Day 2 of the festival. He got the crowd hype, screaming ?G-G-G-G-Unit!? from backstage before performing classics like ?In Da Club.?(Photo: Kevin Winter/Getty Images for iHeartMedia)

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G-G-G-G-Unit - 50 Cent held it down in the name of hip hop on Day 2 of the festival. He got the crowd hype, screaming ‘G-G-G-G-Unit!’ from backstage before performing classics like “In Da Club.”(Photo: Kevin Winter/Getty Images for iHeartMedia)

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Squad Up - 50 couldn?t perform at the iHeart Festival without his Guerrilla Unit crew. Tony Yayo, Lloyd Banks, Kidd Kidd and Young Buck joined the head honcho to perform a medley of G-Unit?s individual hits including throwbacks like ?Beamer Benz or Bently,? ?Ayo Technology? and ?I Get Money.? The crew also performed new joints off their The Beauty of Independence EP.(Photo: Ethan Miller/Getty Images for iHeartMedia)

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Squad Up - 50 couldn’t perform at the iHeart Festival without his Guerrilla Unit crew. Tony Yayo, Lloyd Banks, Kidd Kidd and Young Buck joined the head honcho to perform a medley of G-Unit’s individual hits including throwbacks like “Beamer Benz or Bently,” “Ayo Technology” and “I Get Money.” The crew also performed new joints off their The Beauty of Independence EP.(Photo: Ethan Miller/Getty Images for iHeartMedia)

Double Dose - Jessie J may have been missing in action (touring in Europe), but that didn?t stop Nicki Minaj and Ariana Grande from shutting down their verses on her No. 1 hit ?Bang Bang? during Minaj?s Friday night set.(Photo: Ethan Miller/Getty Images for iHeartMedia)

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Double Dose - Jessie J may have been missing in action (touring in Europe), but that didn’t stop Nicki Minaj and Ariana Grande from shutting down their verses on her No. 1 hit “Bang Bang” during Minaj’s Friday night set.(Photo: Ethan Miller/Getty Images for iHeartMedia)

More Surprises - During Ed Sheeran?s Saturday set, he hinted that he was bringing out Macklemore and Ryan Lewis when he did an acoustic version of their track ?Same Love.? Sure enough the duo joined him on stage to complete the jam session.(Photo: Christopher Polk/Getty Images for iHeartMedia)

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More Surprises - During Ed Sheeran’s Saturday set, he hinted that he was bringing out Macklemore and Ryan Lewis when he did an acoustic version of their track “Same Love.” Sure enough the duo joined him on stage to complete the jam session.(Photo: Christopher Polk/Getty Images for iHeartMedia)

Lil Jon - (Photo: Christopher Polk/Getty Images for iHeartMedia)

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Get Crunked Up - Lil Jon gave the crowd life with a surge of energy in his performance of his radio hit “Turn Down for What.” He even performed a new track, “Bend Over,” and threw in some of his classics like “Yeah!” “Get Low” and “Shots.”(Photo: Christopher Polk/Getty Images for iHeartMedia)

An Unlikely Pairing - Actor Donald Glover got in his zone channeling his alter ego, Childish Gambino. He hit the stage with Ariana Grande to perform their new duet, ?Break Your Heart Right Back." Gambino, who is gearing up for his STN MTN / KAUAI mixtape, continued to captivate the audience with show-stopping performances of ?Sweatpants? and ?3005.? All without a Drake rant.(Photo: Isaac Brekken/Getty Images for iHeartMedia)

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An Unlikely Pairing - Actor Donald Glover got in his zone channeling his alter ego, Childish Gambino. He hit the stage with Ariana Grande to perform their new duet, “Break Your Heart Right Back." Gambino, who is gearing up for his STN MTN / KAUAI mixtape, continued to captivate the audience with show-stopping performances of “Sweatpants” and “3005.” All without a Drake rant.(Photo: Isaac Brekken/Getty Images for iHeartMedia)