If you mean the late Selena, the latina singer killed by a fan, then I'd say physically she was
cuter, but the fact she is dead and Miley is not makes Miley the hot one.
Miley is indeed probably hotter at a body temp of 98.6 degrees that the late singer Selena would be with her body core temp at the temperature she would now have since she is no longer living and cannot regulate her own body heat. I would say she probably would be at the warmest 68 degrees fahrenheit.