Katy Perry > Britney Spears > Rihanna > Christina Aguilera > Lady Gaga > Beyoncé
I actually respect Beyoncé the most from the list, but I find her to be the least interesting.
Her music just isn't for me, and I can't really connect with her on any level to be honest.
Ke$ha would be above Katy, but she really isn't one of the "majors" anymore. Shame.