Bey seems the most likely.
Edit: the results
I am not doubting that Brit can have a huge hit again (she definitely can), but c'mon.. WB debuted outside the top 10
and if I remember correctly it was released with the music video right ? either way, It didn't have much promo but it had a spot on GMA in its release week ...
Applause leaked, got released on a TUESday in the middle of Roar's huge radio deal, it got overshadowed by it (it was just bound to happen) and it debuted in top 5 on Hot 100 with no promo in its first week ....
Promo is not the problem. S&S was not promoted either and it smashed ..