The Grammy winner glimmered in a sequin black jumpsuit.
Talk about confident! The songstress looked fierce in a black and white jumpsuit.
The "Hands to Myself" singer looked fashion forward in an orange jumpsuit with cutouts at the waist.
The rapper opts for dark lipstick and a sporty, casual look while showcasing her blingtastic engagement ring.
The producer looked handsome in a gray suit jacket.
The "Replay" songstress looked red hot in a red two piece suit with black and white trim.
The rapper opted for a pink button down and ripped jeans for the night of awards.
The "No" singer dazzled the iHeartRadio red carpet in a black sequin cocktail dress and fringe heels.
The triple threat kept his fashion simple in leather pants and a denim button down.
The singer sparkled in a blue sequin mini dress.
The Backstreet Boys singer looked laid back in layers.
The award show's host sported a Michael Jackson-inspired red jacket.
The actress looked tango-inspired in a ruffled crop top and black flare pants.
The producer and DJ wears a slim grey suit.
The ballroom dance pro sported a white hot jumpsuit with sailor buttons.
The "Zero" crooner sported a sleek white ensemble on the iHeartRadio red carpet.
The actress dazzles in mini beige dress with gold and coral accents.
The singer looked Johnny Cash-inspired in an all black ensemble.
The Disney star stood out in the crowd in a little black dress with colorful embroidery.
The E! News co-host looked fashion forward in a sleek black jumpsuit.
The smiling actress gave the iHeartRadio Music Awards a colorful punch in an orange leather dress with whimsical shoulder details.