Mariah Carey: "How I got thin!"

At the 10th Anniversary of VH1’s Save the Music, Mariah Carey showed off her trim, new figure. The pop singer is estimated to have lost 25 pounds and she attributes it to what she calls “a bleak diet.”

“It’s about discipline. I have a lot of discipline,” she told OK! Mariah has an album coming out this fall and decided it was time to get in shape.

To read more about Mariah, pick up the new issue of OK! on newsstands everywhere Thursday!