Pop: Pixie Lott
Rap/Hip Hop: Tinie Tempah
Rock: Nickelback
Metal; Asking Alexandria
Indie Rock (wide field): The Black Keys
Pop-Punk: All Time Low
EDM: Magnetic Man
Electronica (if its a genre these days): The Knife

I'm a bit drunk, so those are what I can think of that I hate at the moment. Go.