Because why not.
The pair discussed Mariah's upcoming nuptials, with Carey revealing that she won't be getting married on the strip, and that she wouldn't be married by an Elvis impersonator. Giving the camera a good shot of her inexplicably large engagement ring, Mariah chatted about hubby-to-be, Australian billionaire James Packer, who she assured Jimmy wouldn't be jealous of their joint bathtime.
Clearly the hot water did Mariah good because she was in high spirits, also joking about how she's no stranger to the clothed bathing experience, often sharing a bath with twin sons Monroe and Moroccan who are, in her words, "really into the discovery of it all." I'd keep my bathing suit on too.
Check out Kimmel quizzing Mimi on her sports knowledge, which it transpires is sorely lacking:
Mariah's fourth leg of her Vegas residency - 'Mariah Carey #1 to Infinity' - kicks off on June 7 at Ceasar's Palace.