Full list of winners below...
Album Of The Year
Beck, Morning Phase - WINNER
Beyonce, Beyonce
Ed Sheeran, x
Sam Smith, In the Lonely Hour
Pharrell Williams, Girl
Best New Artist
Sam Smith - WINNER
Bastille
Iggy Azalea
Brandy Clark
Haim
Record Of The Year
Stay With Me (Darkchild Version), Sam Smith - WINNER
Fancy, Iggy Azalea ft. Charli XCX
Chandelier, Sia
Shake It Off, Taylor Swift
All About That Bass, Meghan Trainor
Song Of The Year
Stay With Me (Darkchild Version), Sam Smith - WINNER
Chandelier, Sia
All About That Bass, Meghan Trainor
Shake It Off, Taylor Swift
Take Me to Church," Hozier
Best Rap Album
The Marshall Mathers LP2, Eminem - WINNER
The New Classic, Iggy Azalea
Because the Internet, Childish Gambino
Nobody's Smiling, Common
Oxymoron, ScHoolboy Q
Blacc Hollywood, Wiz Khalifa
Best Pop Duo/Group Performance
Say Something, A Great Big World ft. Christina Aguilera - WINNER
Fancy, Iggy Azalea ft. Charli XCX
A Sky Full of Stars, Coldplay
Bang Bang, Ariana Grande, Jessie J & Nicki Minaj
Dark Horse, Katy Perry ft. Juicy J
Best Rap Performance
i, Kendrick Lamar - WINNER
3005, Childish Gambino
0 to 100/The Catch Up, Drake
Rap God, Eminem
All I Need Is You, Lecrae
Best Alternative Music Album
St. Vincent, St. Vincent - WINNER
This Is All Yours, alt-J
Reflektor, Arcade Fire
Melophobia, Cage the Elephant
Lazaretto, Jack White
Best Rock Album
Morning Phase, Beck - WINNER
Ryan Adams, Ryan Adams
Turn Blue, The Black Keys
Hypnotic Eye, Tom Petty & the Heartbreakers
Songs of Innocence, U2
Best Rock Song
Ain't It Fun, Paramore - WINNER
Blue Moon, Beck
Fever, The Black Keys
Gimme Something Good, Ryan Adams
Lazaretto, Jack White
Best Country Album
Platinum, Miranda Lambert - WINNER
Riser, Dierks Bentley
The Outsiders, Eric Church
The Way I'm Livin', Lee Ann Womack
12 Stories, Brandy Clark
Best Rap/Sung Collaboration
The Monster, Eminem ft. Rihanna - WINNER
Blak Majik, Common ft. Jhené Aiko
Tuesday, I Love Makonnen ft. Drake
Studio, ScHoolboy Q ft. BJ The Chicago Kid
Bound 2, Kanye West & Charlie Wilson
Best Rap Song
i, Kendrick Lamar - WINNER
Anaconda, Nicki Minaj
Bound 2, Kanye West & Charlie Wilson
We Dem Boyz, Wiz Khalifa
0 to 100/The Catch Up, Drake
Best Country Song
I'm Not Gonna Miss You, Glen Campbell - WINNER
American Kids, Kenny Chesney
Automatic, Miranda Lambert
Give Me Back My Hometown, Eric Church
Meanwhile Back at Mama's, Tim McGraw ft. Faith Hill
Best Country Duo/Group Performance
Gentle On My Mind, The Band Perry - WINNER
Somethin' Bad, Miranda Lambert with Carrie Underwood
Day Drinking, Little Big Town
Meanwhile Back At Mama's, Tim McGraw ft. Faith Hill
Raise 'Em Up, Keith Urban ft. Eric Church
Best Country Solo Performance
Something In the Water, Carrie Underwood - WINNER
Give Me Me Back My Hometown, Eric Church
Invisible, Hunter Hayes
Automatic, Miranda Lambert
Cop Car, Keith Urban
Best Pop Vocal Album
In the Lonely Hour, Sam Smith - WINNER
Ghost Stories, Coldplay
Bangerz, Miley Cyrus
My Everything, Ariana Grande
Prism, Katy Perry
x, Ed Sheeran
Best Urban Contemporary Album
G I R L, Pharrell Williams - WINNER
Sail Out, Jhene Aiko
Beyonce, Beyonce
X, Chris Brown
Mali Is, Mali Music
Best Dance/Electronic Album
Syro, Aphex Twin - WINNER
While (1, Deadmaus
Nabuma Rubberband, Little Dragon
Do It Again, Röyksopp & Robyn
Damage Control, Mat Zo
Best Pop Solo Performance
Happy, Pharrell Williams - WINNER
All of Me, John Legend
Chandelier, Sia
Stay With Me, Sam Smith
Shake It Off, Taylor Swift
Best Reggae Album
Ziggy Marley, Fly Rasta - WINNER
Lee 'Scratch' Perry, Back on the Controls
Sean Paul, Full Frequency
Shaggy, Out of Many, One Music
Sly & Robbie & Spicy Chocolate, The Reggae Power
Soja, Amid the Noise and the Haste
Best Traditional Pop Vocal Album
Cheek to Cheek, Lady Gaga & Tony Bennett - WINNER
Sending You a Little Christmas, Johnny Mathis
Nostalgia, Annie Lennox
Partners, Barbra Streisand
Night Songs, Barry Manilow
Best Americana Album
The River & The Thread, Rosanne Cash - WINNER
Terms of My Surrener, John Hiatt
Bluesamericana, Keb' Mo'
A Dotted Line, Nickel Creek
Metamodern Sounds in Country Music, Sturgill Simpson
Best Spoken Word Album
Diary of a Mad Diva, Joan Rivers - WINNER
Actors Anonymous, James Franco
A Call to Action, Jimmy Carter
Carsick: John Waters Hitchhikes Across America, John Waters
A Fighting Chance, Elizabeth Warren
We Will Survive: True Stories of Encouragement, Inspiration and the Power of Song, Gloria Gaynor
Best Gospel Album
Help, Erica Campbell - WINNER
Amazing, Ricky Dillard & New G
Withholding Nothing: Live, William McDowell
Forever Yours, Smokie Norful
Vintage Worship, Anita Wilson
Best Rock Performance
Lazaretto, Jack White - WINNER
Gimme Something Good, Ryan Adams
Do I Wanna Know?, Arctic Monkeys
Blue Moon, Beck
Fever, The Black Keys
Best Metal Performance
The Last In Line, Tenacious D - WINNER
Neon Knights, Anthrax
High Road, Mastodon
Heartbreaker, Motörhead
The Negative One, Slipknot
Best R&B Performance
Drunk In Love, Beyoncé ft. Jay Z - WINNER
New Flame, Chris Brown ft. Usher & Rick Ross
It's Your World, Jennifer Hudson ft. R. Kelly
Like This, Ledisi
Good Kisser, Usher
Best R&B Song
Drunk In Love, Beyonce ft. Jay Z - WINNER
Good Kisser, Usher
New Flame, Chris Brown ft. Usher & Rick Ross
Options (Wolfjames Version), Luke James ft. Rick Ross
The Worst, Jhené Aiko
Best R&B Album
Love, Marriage & Divorce, Toni Braxton & Babyface -WINNER
Islander, Bernhoft
Lift Your Spirit, Aloe Blacc
Black Radio 2, Robert Glasper Experiment
Give The People What They Want, Sharon Jones & The Dap-Kings
Best Dance Recording
Rather Be, Clean Bandit ft. Jess Glynne - WINNER
Never Say Never, Basement Jaxx
F for You, Disclosure ft. Mary J. Blige
I Got U, Duke Dumont ft. Jax Jones
Faded, Zhu
Best Latin Pop Album
Tangos, Ruben Blades - WINNER
Elypse, Camila
Raiz, Lila Downs, Niña Pastori & Soledad Pastorutti
Loco de Amor, Juanes
Gracias Por Estar Aqui, Marco Antonio Solis
Best Compilation Soundtrack for Visual Media
Frozen - WINNER
Guardians of the Galaxy
American Hustle
Get On Up: The James Brown Story
The Wolf of Wall Street
Best Music Video
Happy, Pharrell Williams - WINNER
We Exist, Arcade Fire
Turn Down for What, DJ Snake & Lil Jon
Chandelier, Sia
The Golden Age, Woodkid ft. Max Richter
Best Music Film
20 Feet From Stardom, Darlene Love, Merry Clayton, Lisa Fischer & Judith Hill - WINNER
Beyoncé & Jay Z: On The Run Tour, Beyoncé & Jay Z
Ghost Stories, Coldplay
Metallica: Through The Never, Metallica
The Truth About Love Tour: Live From Melbourne, Pink