Will people STOP comparing her predicted single success to other artist successful singles. That is NOT how it works.
It doesn't matter if BEP had huge hits, this is Britney Spears not BEP. BEP promoted every single at every chance from IGAF to Dirty Bit, they go to every huge show, and perform them...Britney will not. Britney will not have that same success and it's time for you to deal and get over it.
Just like if Britney released an "equality anthem" produced by Stargate, it won't be as successful as Firework, cause Katy performed it at every turn. That is what happened to Rihanna fans, "OH MY GOSH CKB will smash just like Big Girls Don't Cry"...and where did it peak, how much did it flop on radio?
If it was such a smash waiting to happen, it would be charting in the Top 1000 already.