I mean she's pretty no doubt, but something about her screams 'artificial' to me.. i don't think she's going to age well lol.. she's based too much of her artistry on her aesthetics without really branching out, it's a little too 'bubblegummy' of an image for me to see her any differently. Just 2 cents
But realistically, next to some other pop stars she looks very pedestrian. Beyonce has such a striking beautiful presence and you dont even need to be in her general vicinity to feel it.
And I'd say Rihanna is prettier, but katy is prettier than rihanna sans make-up.