Where does Taylor Swift's huge success come from?

Personally, I find it hard to understand its success. Mind you, she's obviously talented, and you don't get to this level by chance.

But what surprises me is that she seems to have only one reference song, or at least I only know one song by her as being a real "classic", whereas we play a lot of American songs here.

But maybe in the US her songs are everywhere lol
Where does Taylor Swifts huge success come from?
Where does Taylor Swift's huge success come from?
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