Officially her longest running US #1 (8 weeks!), was previously Blank Space with 7 :cheer:

 

And what a perfect single to break the record

Eh, 'Blank Space' was way better. And it didn't need the remix shenanigans to get all of its weeks at #1 :whistle:

If only 'Blank Space' was a UK #1 too. -_-