was featured on The Dr. Oz
Show on Monday, and Extra correspondent A.J. Calloway caught up with a vibrant, sexy Kirstie backstage at the taping.
Asked about finally conquering her weight, Kirstie said: "I know I've conquered it, but you always have to keep it in check.
Kirstie shared her weight maintenance secrets, which includes dancing an hour a day and a simple, organic philosophy: "Eat the food you love, just not food ...