Iggy Azalea and Sam Smith lead the iHeartRadio Music Award nominations.
Iggy Azalea
The 24-year-old rapper has received four nominations in the Artist of the Year, Best New Artist and Renegade categories, while also getting a nod in the Best Collaboration category for 'Fancy' featuring Charli XCX.
British singer-songwriter Sam also racked up four nominations, with 'Stay With Me' being shortlisted in the Song of the Year and Best Lyrics categories, while he is also up for Artist of the Year and Best New Artist.
As well as their own nominations, both Sam and Iggy have been acknowledged for their featuring spots, with 'Problem' by Ariana Grande which Iggy raps on being nominated for Best Collaboration, and the 22-year-old singer's vocal contribution to Naughty Boy's hit 'La La La' being praised in the Best Dance Song category.
'Shake It Off' hitmaker Taylor Swift - whose fifth album '1989' was one of the world's best selling albums in 2014 - accrued four nods including Artist of the Year, Best Fan Army, Song of the Year for 'Shake It Off' and Best Lyrics for 'Blank Space'.
Elsewhere, Ariana Grande and Meghan Trainor follow with three nominations each, while 'I See You' singer Luke Bryan has been shortlisted for Artist of the Year and Country Song of the Year for 'Play It Again'.
The ceremony which will take place at the Shrine Auditorium in Los Angeles on Sunday March 29 follows the inaugural event last year which saw Rihanna crowned as Artist of the Year and Lorde win Best New Artist.
The full list of nominations for the iHeartRadio Music Awards:
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
Tagged in Taylor Swift Iggy Azalea Sam Smith