2021 iHeartRadio Music Awards red carpet fashion

Demi Lovato stuns in a velvet pantsuit -- sans a shirt --at the 2021 iHeartRadio Music Awards at The Dolby Theatre in Los Angeles, Calif. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

Machine Gun Kelly, winner of the Alternative Rock Album of the Year award for 'Tickets To My Downfall,’ and Megan Fox make it a date night. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

Doja Cat hits dons a sheer outfit at the show. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

Megan Thee Stallion rocks a shimmery cutout dress. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

Brandi Carlile and H.E.R. are all smiles at the award show. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

(L-R) Dan Smyers and Shay Mooney of music group Dan + Shay are also in attendance. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

LL Cool J strikes a pose at the event. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

Lil Nas X hit the award show in a silver jacket and pants -- also sans a shirt. (Photo by Emma McIntyre/Getty Images for iHeartMedia)

Gabby Barrett rocks a little black dress. (Photo by Emma McIntyre/Getty Images for iHeartMedia)