All the Must-See Action From the iHeartRadio Music Festival

The iHeartRadio Music Festival kicked off at the MGM Grand in Las Vegas on Friday and brought out some of music's biggest names over the weekend. Nick Jonas and Jennifer Lopez took the stage on Saturday, while Kanye West ran through 18 of his greatest hits on Friday. On top of the epic performances, stars like Joe Jonas, Taylor Lautner, and famous duo Demi Lovato and Wilmer Valderrama gathered backstage for some fun pictures throughout the weekend. Scroll through for all the must-see snaps of the stars, and stay tuned for more action from the three-day festival!

Jennifer Lopez
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Jennifer Lopez

Blake Shelton
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Blake Shelton

Taylor Lautner and Tori Kelly
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Taylor Lautner and Tori Kelly

Darren Criss and Hailee Steinfeld
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Darren Criss and Hailee Steinfeld

Joe Jonas
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Joe Jonas

Tove Lo and Nick Jonas
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Tove Lo and Nick Jonas

Jennifer Lopez and Ryan Seacrest
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Jennifer Lopez and Ryan Seacrest

Rita Ora
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Rita Ora

The Weeknd and Diddy
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The Weeknd and Diddy

Jennifer Lopez and Casper Smart
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Jennifer Lopez and Casper Smart

Diddy and Mase
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Diddy and Mase

Lil' Kim
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Lil' Kim

Kanye West
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Kanye West

Ryan Seacrest and Jared Leto
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Ryan Seacrest and Jared Leto

Joe Jonas and Josh Hutcherson
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Joe Jonas and Josh Hutcherson

Chris Martin
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Chris Martin

Kanye West and Jared Leto
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Kanye West and Jared Leto

Ashley Tisdale and Christopher French
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Ashley Tisdale and Christopher French

Taylor Lautner and Wilmer Valderrama
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Taylor Lautner and Wilmer Valderrama

Joe Jonas and Nick Jonas
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Joe Jonas and Nick Jonas

Sam Smith
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Sam Smith

Nick Jonas
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Nick Jonas