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Hit Nation

The 57th Annual Grammy Awards air live tonight on CBS, and before the trophies are handed out, iHeartRadio is making some predictions on who will take home the biggest awards of the night.

Based on the listening habits of iHeartRadio users, iHeartRadio is predicting winners in six coveted categories: Song of the Year, Best New Artist, Album of the Year, Best Rock Song, Best Country Song and Best Rap Song. Check out iHeartRadio's Grammy predictions and make sure to let us know your thoughts in the comment section below!

SONG OF THE YEAR

Megan Trainor - All About That Bass
Sia - Chandelier
Taylor Swift - Shake It Off
Sam Smith - Stay With Me
Hozier - Take Me to Church

"Last year listeners correctly predicted that 'Royals' by Lorde would be song of the year with the highest thumb ratio in the category," explains iHeartRadio data team's Joe Chisari & Jonas Prankevicius."This year listeners are picking 'All About That Bass' by Megan Trainor. Personally, we think Hozier has a great shot to steal this one."

BEST NEW ARTIST

Sam Smith
Bastille
Brandy Clark
Haim
Iggy Azalea

Sam Smith is the winner based on how many people listen to Sam Smith's station and gives his music thumbs up. Iggy Azalea was a very close second.

ALBUM OF THE YEAR

Beyonce - Beyonce
Sam Smith - In The Lonely Hour
Pharell Williams - G I R L
Ed Sheeran - x
Beck - Morning Phase

"A close race between Beyonce, Sam Smith, and Ed Sheeran," say Chisari & Prankevicius, adding "Sheeran’s thumbs have been up recently and Sam Smith has the highest thumb ratio, but we are going with Beyonce here because she has the most station starts and the second best thumb ratio."

BEST ROCK SONG

The Black Keys -  Fever
Jack White - Lazaretto
Beck - Blue Moon
Paramore - Ain’t It Fun
Ryan Adams - Gimme Something Good

"Extremely close race between Jack White and The Black Keys. Listeners preferred 'Fever' slighty t' ‘Lazaretto,' but with more station starts this year we are picking The Black Keys to win."

BEST COUNTRY SONG

Eric Church - Give Me Back My Hometown
Kenny Chesney - American Kids
Miranda Lambert - Automatic
Glem Campbell - I’m Not Gonna Miss You
Tim McGraw - Meanwhile Back At Mama’s

Erich Church is a clear winner based on iHeartRadio listener preferences.

BEST RAP SONG

Drake - 0 to 100
Nicki Minaj - Anaconda
Wiz Khalifa - We Dem Boyz
Kendrick Lamar - i
Kanye West - Bound 2

Drake tops this category easily based on iHeartRadio data in thumbs and station starts.