Mariah Carey looks better than ever!

Wearing a fitted, black leather mini dress, the singer showed off her impressive weight loss while dining at Mr. Chow in Beverly Hills.

Mariah could be preparing for her "grand" wedding to billionaire fiancé James Packer —we can't wait to see the dress! — but it's clear this mother-of-two's workout regimen is definitely paying off.

Click through the slideshow to see more photos of her stunning weight loss transformation!