Meghan Trainor | 2014 iHeartRadio Music Festival | Red Carpet

5 Seconds of Summer | 2014 iHeartRadio Music Festival | Red Carpet

Iggy Azalea | 2014 iHeartRadio Music Festival | Red Carpet

Johnny Galecki | 2014 iHeartRadio Music Festival | Red Carpet

Hilary Duff | 2014 iHeartRadio Music Festival | Red Carpet

Paramore Hayley Williams | 2014 iHeartRadio Music Festival | Red Carpet

Fergie | 2014 iHeartRadio Music Festival | Red Carpet

One Direction (Niall Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson) 2014 IHeartRadio Music Festival Press Room Red Carpet Arrivals at MGM Grand in Las Vegas, NV September 19 and 20

#onedirection in the house #1D #iheartradio #fcpx One Direction in Las Vegas (at MGM Grand Las Vegas)

Arielle Kebbel | 2014 iHeartRadio Music Festival | Red Carpet

Usher | 2014 iHeartRadio Music Festival | Red Carpet

Chris Brown | 2014 iHeartRadio Music Festival | Red Carpet

Taylor Swift | 2014 iHeartRadio Music Festival | Red Carpet

Taylor Momsen | 2014 iHeartRadio Music Festival | Red Carpet

Karina Smirnoff and Randy Couture | 2014 iHeartRadio Music Festival | Red Carpet