It's already a huge hit.
The track is on pace for 600,000 downloads in its opening week, meaning it will challenge Flo Rida (and "Right Round") for the largest debut of all-time and shatter the female record-holder: Lady Gaga with "Born This Way."
The song also broke in to the Billboard Hot 100 at number-72, but its initial seven days of sales, combined with its overwhelming airplay, make it a strong favorite to hold the top spot later this month.
SoundScan will post final scales figures tomorrow, but we don't need to wait until then to declare: the music world belongs to Taylor Swift. All other artists are just living in it.