Taylor Swift, Ariana Grande, Iggy Azalea iHeartRadio Feud: Pop Stars Battle It Out for Top Honor as 2015 Nominees Are Announced

Taylor Swift, Ariana Grande and Iggy Azalea are about to battle it out. No, these three pop princesses aren't in a feud with each other -- they're actually all up for the top honor at this year's iHeartRadio Awards. The singers are also joined in the category by Luke Bryan and Sam Smith, as these two gents hope to take the trophy from the pop divas. But should they come up empty-handed in this category, the five of them lead the pack with other nominations for the night.

According to E! News, Iggy and Sam are the frontrunners with five nods, while Ariana and Taylor come in second with four nominations each.

This year's event will take place March 29 and be held at the Shrine Auditorium in Los Angeles, where it will be broadcast live on NBC and simultaneously aired on iHeartRadio stations across the country.

IHeartRadio will also reach out to fans for their help in determining the winners in the Best Fan Army, Best Lyrics, and Renegade Award categories. Voting will begin for these three awards March 2 and conclude March 20.

The following are the list of nominees, according to Rolling Stone.

Artist of the Year
Ariana Grande
Iggy Azalea
Luke Bryan
Sam Smith
Taylor Swift

Song of the Year
Meghan Trainor - "All About That Bass"
John Legend - "All of Me"
Pharrell Williams - "Happy"
Taylor Swift - "Shake It Off"
Sam Smith - "Stay with Me"

Best Collaboration
Jessie J, Ariana Grande, Nicki Minaj - "Bang Bang"
Katy Perry featuring Juicy J - "Dark Horse"
Iggy Azalea featuring Charli XCX - "Fancy"
Ariana Grande featuring Iggy Azalea - "Problem"
Jason Derulo featuring 2 Chainz - "Talk Dirty"

Best New Artist
Bastille
Cole Swindell
Iggy Azalea
Meghan Trainor
Sam Smith

Country Song of the Year
Lady Antebellum - "Bartender"
Jason Aldean - "Burnin' It Down"
Florida Georgia Line - "Dirt"
Eric Church - "Give Me Back My Hometown"
Luke Bryan - "Play It Again"

Hip Hop/R&B Song of the Year
Jeremih featuring YG - "Don't Tell 'Em"
Beyoncé featuring Jay Z - "Drunk in Love"
Beyoncé - "Flawless"
Chris Brown featuring Lil Wayne and Tyga - "Loyal"
Chris Brown featuring Usher and Rick Ross - "New Flame"

Dance Song of the Year
Martin Garrix - "Animals"
Calvin Harris featuring John Newman - "Blame"
Naughty Boy featuring Sam Smith - "La La La"
Calvin Harris - "Summer"
Mr. Probz - "Waves"

Alternative Rock Song of the Year
KONGOS - "Come with Me Now"
Arctic Monkeys - "Do I Wanna Know?"
The Black Keys - "Fever"
Foo Fighters - "Something from Nothing"
Hozier - "Take Me to Church"

Best Lyrics
John Legend - "All of Me"
Taylor Swift - "Blank Space"
OneRepublic - "Counting Stars"
Tove Lo - "Habits (Stay High)"
Sam Smith - "Stay with Me"
Ed Sheeran - "Thinking Out Loud"

Best Fan Army
5SOSFAM - 5 Seconds of Summer
Arianators - Ariana Grande
Bey Hive - Beyoncé
Team Breezy - Chris Brown
Sheerios - Ed Sheeran
Church Choir - Eric Church
Directioners - One Direction
Selenators - Selena Gomez
Mendes Army - Shawn Mendes
Swifties - Taylor Swift

Renegade
Brantley Gilbert
Charli XCX
Hozier
Iggy Azalea
Meghan Trainor