Oh Mimi, when will you learn?

Mariah Carey needs to get a new stylist and fast!

The one-size-too-small dresses she wears with the overly exposed cleavage just isn't working for her anymore.

Mimi was spotted last night arriving at her hotel in London at one in the morning looking a bit tired.

The diva had just performed on the Italian version of The X Factor earlier that evening in Milan.

Mimi, seriously, we love your curves and all, but that satin dress with the boobs about to pop out it's not helping any.

Black is supposed to be slimming, but it can only do so much.

[Image via WENN.]