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Iggy Azalea, Sam Smith lead iHeartRadio nominees

Sam Smith performs at The Apollo Theater on June 17, 2014, in New York.

Theo Wargo/Getty Images

Iggy Azalea and Sam Smith led the finalists for the 2015 iHeartRadio Music Awards with five nominations apiece, with Taylor Swift and Ariana Grande each receiving four nominations.

iHeartMedia and NBC announced the nominations Wednesday. The awards will be presented March 29 at the Shrine Auditorium in Los Angeles. The event will be televised live on NBC and air simultaneously on iHeartMedia stations and across the network's digital music platform.

Swift, Azalea, Grande, Smith and Luke Bryan are nominated for artist of the year. Best new artist nominees include Azalea, Smith, Bastille, Cole Swindell and Meghan Trainor. Other categories include song of the year and best collaboration.

Fans can vote for three awards, including best lyrics.