Whatever diet Jordin Sparks is on... we want in. The singer looked significantly skinnier when posing on the red carpet at Muhammad Ali’s Celebrity Fight Night in Phoenix over the weekend.

In fact, some are saying she's lost as much as 30 pounds since last year! How did she do it? So far, mums the word for the American Idol winner.

Although, she's said in the past, ""I learned that I'm not ever going to be a size 2. I would look so weird as a size 2. Somebody would blow and I would fall right over. It just wouldn't be healthy."

Well, she looks to be pretty darn close to a size 2 now, and she's never looked better. We want your secret, Jordin! (Popeater)

Faye Brennan is assistant editor at BettyConfidential.