Kelly Osbourne is trying to maintain her trim physique by doing a 1000 calorie burning workout.
Kelly Osbourne is trying a new workout routine.
The 26-year-old beauty - who shed weight after breaking up with British model LUKE WORRALL last year - is now trying to keep the pounds off by trying out a new way of burning fat.
She tweeted: "just did a 1000 calorie workout i don't think i have ever sweat this much in my life!(sic)"
Despite working hard to keep a trim physique, Kelly recently revealed she would hate to look perfect because of the pressure involved.
She said: "There's such a desire for being perfect in Hollywood and I'll never understand it. You don't need to be perfect. I would never, ever want to be the prettiest girl in the room. It's so much pressure and people never, ever stop to think, 'Is there more to her than that?' You're just a pretty girl and that's it."
"Coming to terms with the fact that you're not perfect and it's OK is comforting. I can't change who I am. People are always like, 'No matter how much weight you lose, you're always going to have a fat face and a big jaw.' And you're like, 'Well, I can't actually change that, so thanks.' "