She has a rock voice, and country is close enough to it, so she can pull those two genres for sure.
The kind of voice she has was really overqualified for dance music in the first place.
She sounded good doing jazz
I don't think she can pull off R&B though. She would sound okay doing it of course but I don't think it would be "pulled off" convincingly.
The songs people listed as R&B that she has done are just mostly pop songs with urban beats.