Numa Numa is brillaint
Yeah Bri Panic! at he disco (sounds like fall out boy) are just hitting the big time.
Also Aiden (sounds like MCR) are gonna get very big very soon.
I think Within Temptation (sounds like Nightwish) are gonna get big soon.
Still Remains (sounds like Killswitch Engage) are gonna make it big, I saw them on the roadrage tour a while ago and they were really good.
I dont believe any year is dominated by a particular genre, because it does depend on what you listen to and how you listen to it.