I'm sorry, but this is like saying you don't know who Elvis is in the late 1950s. Of course you won't know who she is if you refuse to find out who famous musicians are. She's so popular that her fans literally cause earthquakes just by dancing at the same time.
Like I said, I'm not a fan. I know what exactly one Taylor Swift song sounds like and it's only because I was paid to do a parody of it many years ago.