There are still lots of blues and folk ELEMENTS in pop and rock music. As several people have commented, these elements evolve and change over time and get used in new and different ways. Pop and Rock have never been pure forms of music and borrow from all different styles. I'm all for it.

I think groups like the Corrs are fun and energetic, and there is a place for them, just like there's a place for songs like "Achy Breaky Heart." They widen the scope of our choices, and what's wrong with the ol' "it's got a good beat and you can dance to it"? Might not spend my money on it, but you may catch me bopping and singing along in the car. :-)