Top 10 at the very least. Her songs are very receptive of promo so if she slays at the Grammys, the song will fly up and give her another top 10 hit or even top 5.
Honestly, she doesn't even need to release additional singles. She's already sold 15 million copies worldwide, and the purpose of singles are to sell the album. "Flop", at least in regards to this, is irrelevant to her.
compared to the 2nd single from her previous album, yes.
compare to almost every other artist, no.
plus it's already owned on a full-priced CD by more than 8 million americans so...