Katy by a few 100k's

Retirementhomeriah

Will Mariah still sing in 2020?

Katy Patra

in 2020 the magazine headlines will be rip mariah

Mariah will be retired and Katy will flop

Mariah will retire
Katy will be dethrowned and some new artist will take her spot

Mariah will be releasing another buzz single from the Art of Letting go while Katy will be... probably retired/wife of a minister

Katy thanks to a mercy feature on pop icon and female MJ Bonnie McKee's future SMASH hit single.

Sis, that's six years away, why would she die, what do you know that I don't?

Both will be retired

I'd say Katy since Mariah would be almost 50 and we know how hard is to get played on radio when you're older, Katy may still be selling unless she gets married and retired, it's hard to tell tbh.

Probably Katy by quite a bit