Why is Vogue so far down the list? Rihanna's tepid performances are listed twice and Madonna gets ONE non-top three placement? Taylor?

Love On Top instead of Single Ladies?
No '84 Like A Virgin, no Janet 'TTWLG/If, no Madonna/Britney/Christina...this is a ******** list. Billboard needs to be read the riot act for this.
It's like they just let a bunch of interns throw this together. I can't.