Not to be shady but they base their noms on airplay and sales I think. I don't think the elusive chanteuse had enough of those to be nominated this year.
I will say, though, congrats to my dudes John, Sam, and Pharrell. I really don't know who'd I want to win Favorite Male Artist, even though I'm fairly certain Sam has it in the bag.
Why there is even an argument about pop/rock category. Like, it's always been "crossover" one, to nominate popular acts (and some rock acts, if they are popular, which happened back in early 90-s).
Single of the Year
Iggy Azalea f/ Charli XCX - Fancy John Legend - All of Me
Magic! - Rude
Katy Perry f/ Juicy J - Dark Horse
Pharrell Williams - Happy
New Artist of the Year
Iggy Azalea Sam Smith
Bastille
Meghan Trainor
5 Seconds of Summer
Artist of the Year
Iggy Azalea Beyoncé
Luke Bryan
Eminem
Imagine Dragons
Lorde
John Legend
One Direction
Katy Perry
Pharrell Williams
Favourite Female Artist - POP/ROCK
Iggy Azalea Lorde
Katy Perry
Favourite Male Artist - POP/ROCK John Legend
Sam Smith
Pharrell Williams