AMAs 2018: All the looks you didn't see on the red carpet

Stars brought the heat on the 2018 AMAs red carpet ahead of the ceremony, but there were also a slew of celebs who didn't walk the carpet -- or they did, and they slinked into a second (or third!) look during the show or backstage.

From Mariah Carey's sheer-paneled black gown, Cardi B's pom-pom-filled performance look, host Tracee Ellis Ross' multitude of outfit changes, Halsey's retro after-party look and Normani's princess moment, we've rounded up all the most notable celeb looks that you didn't see on the red carpet at the 2018 American Music Awards.

Check them out in the gallery below:

17 PHOTOS
AMAs 2018: All the look you didn't see on the red carpet
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AMAs 2018: All the look you didn't see on the red carpet
LOS ANGELES, CA - OCTOBER 09: Mariah Carey poses in the press room during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - OCTOBER 09: Taylor Swift performs onstage at the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Kevin Mazur/AMA2018/Getty Images For dcp )
LOS ANGELES, CA - OCTOBER 09: Normani attends the 2018 American Music Awards - Press Room at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by David Crotty/Patrick McMullan via Getty Images)
LOS ANGELES, CA - OCTOBER 09: Tracee Ellis Ross speaks onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Phillip Faraone/WireImage,)
LOS ANGELES, CA - OCTOBER 09: Cardi B performs onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Emma McIntyre/AMA2018/Getty Images For dcp )
THE 2018 AMERICAN MUSIC AWARDS(r) - The '2018 American Music Awards,' the world's largest fan-voted awards show, will broadcast live from the Microsoft Theater in Los Angeles, Tuesday, Oct. 9 at 8:00 p.m. EDT, on ABC. (Image Group LA via Getty Images) CAMILA CABELLO
LOS ANGELES, CA - OCTOBER 09: Tracee Ellis Ross speaks onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Kevin Winter/Getty Images For dcp)
LOS ANGELES, CA - OCTOBER 09: Mariah Carey performs onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by John Shearer/AMA2018/Getty Images For dcp)
WEST HOLLYWOOD, CA - OCTOBER 09: Halsey attends Post Malone's '2018 American Music Awards' Hosted By John Terzian And Dre London At Harriet's on October 9, 2018 in West Hollywood, California. (Photo by Vivien Killilea/Getty Images for Dick Clark Productions)
WEST HOLLYWOOD, CA - OCTOBER 09: Drew Taggart and Alex Pall of The Chainsmokers attend Post Malone's '2018 American Music Awards' Hosted By John Terzian And Dre London At Harriet's on October 9, 2018 in West Hollywood, California. (Photo by Vivien Killilea/Getty Images for Dick Clark Productions)
LOS ANGELES, CA - OCTOBER 09: Dua Lipa performs onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Jeff Kravitz/AMA2018/FilmMagic For dcp ,)
LOS ANGELES, CA - OCTOBER 09: Carrie Underwood performs onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Phillip Faraone/WireImage,)
LOS ANGELES, CA - OCTOBER 09: Tracee Ellis Ross speaks onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Phillip Faraone/WireImage,)
LOS ANGELES, CA - OCTOBER 09: Halsey (L) and Khalid perform onstage at the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Kevin Mazur/AMA2018/Getty Images For dcp )
WEST HOLLYWOOD, CA - OCTOBER 09: Jordyn Woods attends Post Malone's '2018 American Music Awards' Hosted By John Terzian And Dre London At Harriet's on October 9, 2018 in West Hollywood, California. (Photo by Vivien Killilea/Getty Images for Dick Clark Productions)
LOS ANGELES, CA - OCTOBER 09: Host Tracee Ellis Ross speaks onstage during the 2018 American Music Awards at Microsoft Theater on October 9, 2018 in Los Angeles, California. (Photo by Kevin Mazur/AMA2018/Getty Images For dcp )
THE 2018 AMERICAN MUSIC AWARDS(r) - The '2018 American Music Awards,' the world's largest fan-voted awards show, will broadcast live from the Microsoft Theater in Los Angeles, Tuesday, Oct. 9 at 8:00 p.m. EDT, on ABC. (Image Group LA via Getty Images) POST MALONE
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