Kelly Osbourne's weight loss secret: Come on, get happy!

Dec 13, 2012 at 7:49 p.m. ET

Kelly Osbourne knows a thing or two about weight loss. The self-described "former fat person" believes those who are miserable will never see true success.

Kelly Osbourne

Kelly Osbourne wants to make one thing clear to those who now envy her svelte form — she got happy before she got thin!

In a new interview with In Touch Weekly, Kelly Osbourne reveals life is full of surprises, and these days she's doing things she never would have imagined when she was heavier.

"[Working out] is something I really enjoy doing," the 5-foot-2-inch Fashion Police host, who now weighs a trim 112 pounds, admitted. "I never thought I’d be that kind of girl."

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Describing the daily routine to keep the pounds away, Osbourne went on, "I do up to half an hour of cardio, and I also do circuit training, yoga or Pilates — I mix it up."

Aside from one cheat day a week during which she can eat whatever she fancies, the 28-year-old sticks to a simple combination of foods.

"For breakfast, I will eat either cereal or a little omelet thingy made with egg whites, mushrooms and spinach," she shared. "Lunch is usually a salad or a turkey burger. And then for dinner, I’ll have brown rice with vegetables and some kind of meat."

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Diet and exercise aside, Kelly Osbourne insists happiness is the bottom line. The woman who famously lost 50 pounds during her spin on Dancing with the Stars explained, "People think I lost weight and then got happy, but that's not how it works. You have to get happy first. I made a life change, and the weight loss was an amazing perk."

Do you believe Kelly Osbourne's "get happy" advice is the real key to weight loss?

Image via WENN