Taylor Swift is Harry Potter because aside from her magical brilliant writing, she's able to make her album releases such Huge Events that she's been able to sell a million in a week multiple times this century (which started in 2001).
Rihanna would be Inferno.
Madonna would be Purgatorio.
Lana Del Rey is either Lolita or The Bell Jar.
Bey is probably Anna Karenina.
Gaga is To The Lighthouse.
Cher is Don Quixote.