Revving up for the 2015 American Music Awards

Singers Avi Kaplan, from left, Kirstin Maldonado, Scott Hoying, Mitch Grassi and Kevin Olusola of Pentatonix rehearse for the American Music Awards.

Singers Avi Kaplan, from left, Kirstin Maldonado, Scott Hoying, Mitch Grassi and Kevin Olusola of Pentatonix rehearse for the American Music Awards.

(Frederick M. Brown / Getty Images for dcp)

Nov. 20, 2015 2:13 PM PT

2015 American Music Awards | Rehearsals

Final stage preparations are made at the 2015 American Music Awards.

(Kevin Winter / Getty Images for dcp)

2015 American Music Awards | Rehearsals

Name cards are placed in seats for performers including Justin Bieber, Ariana Grande and Skrillex.

(Kevin Winter / Getty Images for dcp)

2015 American Music Awards | Rehearsals

Equipment for 5 Seconds of Summer is ready for the band to take the stage.

(Kevin Winter / Getty Images for dcp)

2015 American Music Awards | Rehearsals

Mic check? The night’s performances require a lot of gear.

(Kevin Winter / Getty Images for dcp)

2015 American Music Awards - Rehearsals

Travis Jackson Sr., a producer for 1540 Productions, is in charge of all red-carpet design and construction.

(Kevin Winter / Getty Images for dcp)

2015 American Music Awards | Rehearsals

Pentatonix rehearses for the 2015 American Music Awards.

(Frederick M. Brown / Getty Images for dcp)

2015 American Music Awards | Rehearsals

Equipment for Demi Lovato’s set is ready to go when she takes the stage.

(Kevin Winter / Getty Images for dcp)

2015 American Music Awards | Rehearsals

Production crew works out final details in preparation for the 2015 American Music Awards.

(Kevin Winter / Getty Images for dcp)

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