AMAs Red Carpet Arrivals: Justin Bieber, Carrie Underwood, Selena Gomez (Photos)

Carrie Underwood attends the 2015 American Music Awards at Microsoft Theater in Los Angeles.

Demi Lovato attends the 2015 American Music Awards at Microsoft Theater in Los Angeles.

One Direction members Liam Payne, Louis Tomlinson, Niall Horan and Harry Styles attend the 2015 American Music Awards at Microsoft Theater in Los Angeles.

Ciara attends attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Justin Bieber attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Singer and actress Selena Gomez attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Actress Bailee Madison attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Actor and singer Nick Jonas attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Model Gigi Hadid attends the 2015 American Music Awards at Microsoft Theater in Los Angeles.

Actress Rebel Wilson attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Singer Meghan Trainor attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Skrillex and Diplo attend the 2015 American Music Awards at Microsoft Theater in Los Angeles.

Zendaya attends the 2015 American Music Awards at Microsoft Theater.

Shawn Mendes attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Actress Nina Dobrev attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Actress and dancer Julianne Hough attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Michael Clifford, Calum Hood, Luke Hemmings and Ashton Irwin of 5 Seconds of Summer attend the 2015 American Music Awards at L.A.’s Microsoft Theater.

Paula Abdul attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Pete Wentz, Andy Hurley and Joe Trohman of Fall Out Boy attend the 2015 American Music Awards at Microsoft Theater.

Singer Charlie Puth attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

E! host Giuliana Rancic attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Reality TV star Frankie Grande attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Jenny McCarthy and Donnie Wahlberg attend the 2015 American Music Awards at L.A.’s Microsoft Theater.

Singer Z La La attends the 2015 American Music Awards at L.A.’s Microsoft Theater.

Tyga attends the 2015 American Music Awards at L.A.’s Microsoft Theater.