I don't know where you're from, man. But Radiohead is only somewhat popular in the states.
Nickelback is pop, pure and simple. Their sound is clearly industry studio formula. They're right along with Creed, Puddle of Mudd, Trapt, Staind, and Fuel. All over the radio, had their time on MTV, always playing at the bar. If they actually write their own songs, then they write them radio friendly to make a big living off of them. That's why I suggest that it be moved to the Pop section.