Kanye just expose Taylor Swift to people who living on the coast and international audiences.
Whoever managing she career know what they doing, whether she could sing or not, same thing with Hannah Montana(btw I never knew she and Miley Cyrus was the same person lol)
my opinion is that everybody version of 'mainstream' is different according to where they live
yuh think anybody living in the ghetto go know Garth Brooks and that he sell more album than Jay-z or vice versa if they living in de Upper Midwest?