I don't understand people who say the pop girl era is coming to an end, it isn't, pop girls have existed for decades living through trends and trends, it's not GP's fault every single girl this year released nothing but trash, only Beyoncé served quality, Artpop, prism, britney jean and shakira's album are mediocre and deserve to have lackluster sales.
The strongest competition possible for Q4 I wonder who's gonna come out on top. Although it's quite obvious that in terms of album sales it's going to be Adele > Taylor > Rihanna.