tswiftdaily:

Top Touring Artist:
Bon Jovi
Taylor Swift
Take That
U2 
Roger Waters

Top Country Artist:
Jason Aldean
Zac Brown Band
Lady Antebellum
Blake Shelton
Taylor Swift

The 2012 Billboard Music Awards will take place at Las Vegas’ MGM Grand and be broadcast live Sunday May 20, 8/7c on ABC

source

Taylor Swift winning Billboard 200 Album of the Year