Mariah Carey gave fans a glimpse of her sizeable bum on Instagram

The bootylicious 46-year-old singer gave fans a glimpse of her bum on Instagram ahead of her latest show in Vegas last night.

Wearing a glittery leotard and fishnet tights, Mariah flashed her sizeable behind in the cheeky snapshot.
She captioned the racy picture: "Last looks before showtime."