Without knowing too much about Taylor Swift, I assume she's much more fit than the average person, and muscle weighs more than fat, so her weight might even be a bit misleading here, compared most people.

I would say she's more fit than skinny. She's definitely been skinny and too skinny, but I think she gained a lot of muscle before and during her Eras Tour, making her look less skinny in that picture there.

But, it's problematic to even discuss her weight like this, and it just puts unnecessary pressure on other people, who might see her as skinny.