Amber Rose
Before presenting one of the biggest awards of the evening, the talk-show host and author works a black jumpsuit.
Nick Jonas
Before accepting the iHeartRadio International Artist of the Year award, the "Close" singer shows off his signature style.
Fifth Harmony
Camila Cabello, Normani Hamilton, Dinah-Jane Hansen, Lauren Jauregui and Ally Brooke are ready to work, work, work down the carpet.
Shay Mitchell
Slay Shay, slay!
Gigi Hadid
Radiant in red! The evening's host steps out in a hot number.
Hailey Baldwin
The supermodel works a fully beaded and embroidered gold cocktail dress from KAYAT.
Lucy Hale
Perhaps it's the makeup by Kelsey Deenihan? Maybe the glitzy dress? Whatever the reason, this Pretty Little Liars star looks beautiful.
Hailee Steinfeld
The "Love Myself" singer poses on the carpet before dedicating her performance to dad.
Tyler Posey
Dressing casual has never looked so good on the carpet.
Ashley Benson
Jamie Schneider Mizrahi deserves the credit for styling this Pretty Little Liars star's ensemble.
Alessia Cara
We are "Here" for the singer's casual yet stylish look.
Shemar Moore
Hunk alert! The Criminal Minds star is looking and feeling good on the red carpet.
Italia Ricci
The Supergirl star is pretty in pink!
Shawn Hook
The "Sound of Your Heart" singer cleans up nicely before his performance.
Bethany Mota
The vlogger and YouTube star is ready to dance the night away.
James Bay
The "Hold Back the River" singer prepares to celebrate the biggest music hits of the year.
Shawn Mendes
The "Life of the Party" singer is ready to rock in Toronto.
NEXT GALLERY: Best of the Red Carpet