after they went solo like Beyoncé did?
It doesn't make sense, Beyoncé wasn't the reason for DCs success(that's why we completely ignore that part of her career, its not part of her legacy).
Beyoncé is on the same level as Rihanna, Gaga, Taylor, Xtina and Avril because she's sold about the same amount of albums as them, even after 17 years in the music industry.
The other girls took way less time!
