Here is a complete list of winners at the 40th Anniversary American Music Awards:
  
ARTIST OF THE YEAR » Justin Bieber
 NEW ARTIST OF THE YEAR » Carly Rae Jepsen
 FAVORITE MALE ARTIST - POP/ROCK » Justin Bieber
 FEMALE ARTIST - POP/ROCK » Katy Perry
 BAND, DUO OR GROUP - POP/ROCK » Maroon 5
 ALBUM - POP/ROCK » Justin Bieber, "Believe"
 MALE ARTIST - COUNTRY » Luke Bryan
 FEMALE ARTIST - COUNTRY » Taylor Swift
 BAND, DUO or GROUP - COUNTRY » Lady Antebellum
 ALBUM - COUNTRY » Carrie Underwood, "Blown Away"
ARTIST - RAP/HIP-HOP » Nicki Minaj
 ALBUM - RAP/HIP-HOP »Nicki Minaj  , "Pink Friday: Roman Reloaded"
 MALE ARTIST - SOUL/R&B » Usher
FEMALE ARTIST - SOUL/R&B » Beyonce
 ALBUM - SOUL/R&B » Rihanna, "Talk That Talk"
 ARTIST - ALTERNATIVE ROCK » Linkin Park
 ARTIST - ADULT CONTEMPORARY » Adele
 ARTIST - LATIN » Shakira
ARTIST - CONTEMPORARY INSPIRATIONAL » tobyMac
ARTIST - ELECTRONIC DANCE MUSIC » David Guetta