previous winnersBest Pop Vocal Album - 1989
Best Instrumental Composition - Afro Latin Jazz Suite
Best Arrangement, Instrumental, or A Cappella - Dance of The Sugar Plum Fairy
Best Arrangement, Instruments, & Vocals - Sue (or In A Season of Crime)
Best Recording Package - Still The King: Celebrating the Music of Bob Wills & His Texas Playboys
Best Boxed or Special Limited Edition Package - The Rise and Fall or Paramount Records
Best Album Notes - Love Has Many Faces
Best Historical Album - The Basement Tapes Complete: The Bootleg Series Vol 11
Best Engineering Album, Non Classical - Sound In Color
Best Remixed Recording - Uptown Funk!
Best Surround Sound Album - Amused To Death
PERFORMANCE
Contemporary Inst. Album - Sylva
New Age Album - Grace
Improvised Jazz Solo - Cherokee
Jazz Vocal Album - For One To Love
Jazz Inst. Album - Past Present
Large Jazz Ensemble Album -
The Thompson Fields
Lati Jazz Album -
Reggae Album -
World Music Album -
Children’s Album -
Spoken Word Album -
PERFORMANCE
Latin Pop Album -
Latin Rock, Urban or Alternative Album -
Regional Mexican Music Album -
Tropical Latin Album -
American Roots Performance -
American Roots Song -
Americana Album -
Bluegrass Album -
Blues Album -
Folk Album -
Regional Roots Music Album -
Engineered Album, Classical -
Producer of the Year, Classical -
Orchestra Performance -
Opera Recording -
Choral Performance -
Chamber Music/Small Ensemble Perf -
Classical Inst. Solo -
Classical Solo Vocal Album -
Classical Compendium -
Contemporary Classical Comp -
Comp, Soundtrack for Visual Media -
Score Soundtrack for Visual Media -
Song Written for Visual Media -
PERFORMANCE
Music Video -
Music Film -
Gospel Perf/Song -
Cont. Christian Music Perf/Song -
Gospel Album -
Cont. Christian Music Album -
Roots Gospel Album -
Country Solo -
Country Duo/Group -
Country Song -
Dance Recording -
Dance/Electronic Album -
PERFORMANCE
R&B Perf -
Trad R&B Perf -
R&B Song -
Urban Cont Album -
R&B Album -
Metal Perf -
Rock Song -
Rock Album -
Alt Music Album
Rap Perf -
Rap/Sung Collab -
Rap Song -
Pop Solo -
Pop Duo/Group -
Trad Pop Vocal Album -
Prod. of the Year, Non-Classical -
He was the music engineer for Beck and Daft Punk too..the past AOTY and Best Engineered Album,Non Classical winners 
It's basically the "Best Pop Album" category. Vocals could play a part in what voters choose because it could shape their overall opinion of the album obviously but it isn't just about that.
