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Pictures | Mon Sep 23, 2013 | 5:00pm EDT

iHeartRadio Festival

<p>Singer Ke$ha performs with dancers during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Singer Ke$ha performs with dancers during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Singer Ke$ha performs with dancers during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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<p>Maroon 5 lead singer Adam Levine jumps as they perform during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Maroon 5 lead singer Adam Levine jumps as they perform during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Maroon 5 lead singer Adam Levine jumps as they perform during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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<p>Norwegian duo Ylvis perform "The Fox" during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Norwegian duo Ylvis perform "The Fox" during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Norwegian duo Ylvis perform "The Fox" during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Miley Cyrus performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Miley Cyrus performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Miley Cyrus performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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<p>Bruno Mars (C) performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Bruno Mars (C) performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Bruno Mars (C) performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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<p>Members of the band Muse perform during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Members of the band Muse perform during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Members of the band Muse perform during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Singer Chris Brown performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Singer Chris Brown performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Singer Chris Brown performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Singer Katy Perry performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Singer Katy Perry performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Singer Katy Perry performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Sean "P. Diddy" Combs introduces Robin Thicke during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Sean "P. Diddy" Combs introduces Robin Thicke during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Sean "P. Diddy" Combs introduces Robin Thicke during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Drake performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Drake performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Drake performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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<p>Queen's drummer Roger Meddows Taylor performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Queen's drummer Roger Meddows Taylor performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Queen's drummer Roger Meddows Taylor performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Members of the band Muse perform during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Members of the band Muse perform during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Members of the band Muse perform during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Singer Adam Lambert (L) performs with Queen's guitarist Brian May during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Singer Adam Lambert (L) performs with Queen's guitarist Brian May during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Singer Adam Lambert (L) performs with Queen's guitarist Brian May during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>British musician Elton John performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

British musician Elton John performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

British musician Elton John performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Robin Thicke (C) performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Robin Thicke (C) performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Robin Thicke (C) performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Keith Urban performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus</p>

Keith Urban performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

Keith Urban performs during the iHeartRadio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 20, 2013. REUTERS/Steve Marcus

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<p>Thirty Seconds to Mars lead vocalist Jared Leto performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Thirty Seconds to Mars lead vocalist Jared Leto performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Thirty Seconds to Mars lead vocalist Jared Leto performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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<p>Avril Lavigne (R) performs on the Village stage during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Avril Lavigne (R) performs on the Village stage during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Avril Lavigne (R) performs on the Village stage during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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<p>Members of English-Irish boy band The Wanted perform in the Village during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. From left are: Siva Kaneswaran, Jay McGuiness, Max George, and Tom Parker. REUTERS/Steve Marcus</p>

Members of English-Irish boy band The Wanted perform in the Village during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. From left are: Siva Kaneswaran, Jay McGuiness, Max George, and Tom Parker. REUTERS/Steve Marcus

Members of English-Irish boy band The Wanted perform in the Village during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. From left are: Siva Kaneswaran, Jay McGuiness, Max George, and Tom Parker. REUTERS/Steve Marcus

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<p>Singer Cher Lloyd performs on the Village stage during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus</p>

Singer Cher Lloyd performs on the Village stage during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

Singer Cher Lloyd performs on the Village stage during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus

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