The 44th Annual American Music Awards took place on November 20, 2016, at the Microsoft Theater in Los Angeles. The 2016 American Music Awards welcomed music’s best and brightest on Sunday. Model Gigi Hadid and comedian Jay Pharoah hosted the event.
And the Winners are:

Artist of the Year
WINNER: Ariana Grande
Justin Bieber
Selena Gomez
Rihanna
Carrie Underwood
Adele
The Weeknd
Beyonce
Twenty One Pilots
Drake

Favourite Female Artist – Pop/Rock
WINNER: Selena Gomez
Adele
Rihanna

Favourite Artist – Alternative Rock
WINNER: Twenty One Pilots
Coldplay
X Ambassadors

Favourite Duo or Group – Country
WINNER: Florida Georgia Line
Old Dominion
Zac Brown Band

Top Soundtrack
WINNER: “Purple Rain”
“Star Wars: The Force Awakens”
“Suicide Squad: The Album”

Favourite Artist – Rap/Hip Hop
WINNER: Drake
Fetty Wap
Future

New Artist of the Year
WINNER: Zayn Malik
Alessia Cara
The Chainsmokers
DNCE
Shawn Mendes

Favourite Song – Country
WINNER: “Humble and Kind”, Tim McGraw
“H.O.L.Y”, Florida Georgia Line
“Die A Happy Man”, Thomas Rhett

Collaboration of the Year
WINNER: “Work From Home”, Fifth Harmony ft. Ty Dolla $ign
“Don’t Let Me Down”, The Chainsmokers ft. Daya
“One Dance”, Drake ft. Wizkid and Kyla
“Work”, Rihanna ft. Drake
“Like I’m Gonna Lose You”, Meghan Trainor ft. John Legend

Favourite Artist – Electronic Dance Music (EDM)
WINNER: The Chainsmokers
Calvin Harris
Major Lazer

Favourite Album – Rap/Hip Hop
WINNER: “Views”, Drake
“What A Time To Be Alive”, Drake and Future
“Fetty Wap”, Fetty Wap

Favourite Duo or Group – Pop/Rock
WINNER: Twenty One Pilots
The Chainsmokers
DNCE

Tour of the Year
WINNER: Beyonce
Madonna
Bruce Springsteen and the E Street Band

Video of the Year
WINNER: “Sorry”, Justin Bieber
“Panda”, Desiigner
“Work”, Rihanna ft. Drake

Favourite Male Artist – Pop/Rock
WINNER: Justin Bieber
Drake
The Weeknd

Favourite Album – Pop/Rock
WINNER: “Purpose”, Justin Bieber
“25”, Adele
“Views”, Drake

Favorite Song – Pop/Rock
WINNER: “Love Yourself”, Justin Bieber
“Hello”, Adele
“One Dance”, Drake ft. Wizkid and Kyla

Favourite Male Artist – Country
WINNER: Blake Shelton
Luke Bryan
Thomas Rhett

Favourite Female Artist – Country
WINNER: Carrie Underwood
Kelsea Ballerini
Cam

Favourite Album – Country
WINNER: “Storyteller”, Carrie Underwood
“Kill the Lights”, Luke Bryan
“Traveller”, Chris Stapleton

Favourite Song – Rap/Hip Hop
WINNER: “Hotline Bling”, Drake
“Panda”, Desiigner
“679”, Fetty Wap

Favourite Male Artist – Soul/R&B
WINNER: Chris Brown
Bryson Tiller
The Weeknd

Favourite Female Artist – Soul/R&B
WINNER: Rihanna
Beyonce
Janet Jackson

Favourite Album – Soul/R&B
WINNER: “Anti”, Rihanna
“Lemonade”, Beyonce
“TRAPSOUL”, Bryson Tiller

Favourite Song – Soul/R&B
WINNER: “Work”, Rihanna
“One Dance”, Drake ft. Wizkid and Kyla
“Don’t”, Bryson Tiller

Favourite Artist – Adult Contemporary
WINNER: Adele
Rachel Platten
Meghan Trainor

Favourite Artist – Latin
WINNER: Enrique Iglesias
J Balvin
Nicky Jam

Favourite Artist – Contemporary Inspirational
WINNER: Hillsong UNITED
Lauren Daigle
Chris Tomlin

Source:
https://blarckbillboard./2016/11/21/who-won-what-at-the-2016-american-music-awards/

Too many unneccessary and silly categories.
P.s when did work become an R&b/soul song?

Best Duo/Group Should have been "The Chainsmokers" tho
My Bryson did not win anything