Obviously Britney's if I only had to choose one.
I used to stan for Jlo when I was a kid so I'd go to hers too if I could.
Mariah is a legend but I wouldn't wanna spend my coins on her show, her show isn't very "Vegasey" especially for a 23 year old like myself.
I love vocals more than anything about music but Mimi can't seem to impress me much lately. Britney's would seem like fun and J Lo, ermm, Id rather not be there tbh.