Iggy Azalea dominates iHeartRadio Award nominations

TheMullumbimby-born rapper and UK artist Sam Smith are tied as they both top the nominations listfor this year's iHeartRadio Music Awards in LA.

With five nods each, both are up against pop artists Taylor Swift andAriana Grande, and country act Luke Bryan for Artist of the Year. Azalea is also up for Best Collaboration –where she's up against herself for her track with Ariana Grande (Problem) andher team-up with Charli XCX for Fancy –as well asBest New Artist (the award was won by Lordein 2014), and theRenegade award, which"recognises an emerging standout artist that defies convention and who takes risks while still staying true to themselves."

Sydney's 5 Seconds of Summer have also been given a nod; the pop band's5SOSFAM is up for Best Fan Army.

Azalea, who won theARIA for Breakthrough Artistlast November, is also up for four Grammy nominations for her debut LPThe New Classicand herBillboard chart history-making singleFancy.The track with Charli XCX received two nominations, forRecord of the Year and Best Pop Duo/Group Performance, whileThe New Classicsees her up against Childish Gambino,Common,ScHoolboy Q,Wiz Khalifaand Eminem for Best Rap Album. Azalea is also up for and Best New Artist.

Held on March 29 at LA'sShrine Auditorium, the second iHeartRadio Music Awards will be broadcast live on NBC in the US andsimultaneously broadcast on iHeartMedia radio stations, which is via The Australian Radio Network(ARN) locally,and on iHeartRadio'sdigital platform. Last year's inaugural iHeartRadio Awards generated8.5 billion social impressions, with the publiccasting over 65 million votes using hashtags on Facebook and Twitter.

Performerswill be announced in the coming weeks.

Nominations for the 2015 iHeartRadio Music Awards are:

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

Song of the Year:
All About ThatBass– Meghan Trainor
All of Me– John Legend
Happy– Pharrell Williams
Shake It Off– Taylor Swift
Stay With Me– Sam Smith

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

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

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

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

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

Alternative Rock Song of the Year:
Come With Me Now– KONGOS
Do I Wanna Know?– Arctic Monkeys
Fever– The Black Keys
Something From Nothing– Foo Fighters
Take Me to Church– Hozier

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

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