Sam Smith, Iggy Azalea, Taylor Swift Lead iHeartRadio Nominations — rollingstone.com

Two of 2014’s biggest breakout stars, Sam Smith and Iggy Azalea, topped the nominees' list for this year's iHeartRadio Music Awards. Smith and Azalea earned five nods each, while Taylor Swift and Ariana Grande followed close behind with four each. All four artists will compete for Artist of the Year, with country star Luke Bryan rounding out the category. The awards show will take place at the Shrine Auditorium in Los Angeles on Sunday, March 29th, airing live on NBC from 8 to 11 p.m. ET/PT.

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