Kelly Osbourne is looking good these days -- and she's not afraid to show it!

"I just shot the cover of Shape Magazine, which was such an incredible experience," she told UsMagazine.com Friday at Teen Vogue's 8th Annual Young Hollywood party in L.A. "I have never worn a bikini in my life before yesterday. I never even thought of wearing one!"

Not that Osbourne has anything to hide: she famously dropped an astonishing 48 pounds after competing on Dancing With the Stars earlier this year -- and she's kept it off since!

So how did it feel for Osbourne, 25, to don a bikini for the first time?

"I cried when I saw the picture," the 112-pound reality star recalled. "Everyone that was there, we all just burst into tears. It was a thrilling experience."

Since her stint on Dancing With the Stars, Osbourne has continued to work with celeb trainer Sarah Hagaman to stay in shape.

"I just commit to half an hour a day. It doesn’t seem overwhelming and I can handle that," she told Us. "I do half an hour on the treadmill and when I feel like doing more, I'll do a few sit-ups and some weights."

Her hard work is certainly paying off. Because she's now in better shape, Osbourne says she's finally able to fit into the designer clothes she always dreamed of wearing.

"Now every designer will send me anything that I want, and I can't believe that I am in this situation," she said. "I opened up all of these zip bags last night from Marchesa -- off the runway -- and I can't believe that it fits me."

from oh no they didn't.



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Kelly Osbourne fashion tips:

1. Invest in Spanx. The right underwear can make an outfit. It can smooth your shape or hold you in all the right places. Big knickers are not embarrassing - they're a bloody life saver! Don't follow the fashion trend of going knickerless and waving your ***** around. I think it's another form of addiction. It's an addiction to attention.

2. Always have a great pair of shoes in your wardrobe. Invest in an expensive pair. A good pair of heels. You wear a pair of Chanel shoes - no one would ever think that the rest of your outfit isn't Chanel and that it might be from Primark (a UK retail chain of very cheap clothes). Actually there is nothing wrong with Primark either.

3. I don't think you have to spend a lot of money on a bag. But pick one that shows off your personality. It's with you come rain or shine.

4. A great pair of jeans is really important. Find that one pair that you always feel good in. You can make jeans look fancy or you can them look casual. For me, the cheaper the jeans the better the fit. I get my jeans from Topshop and they only cost $80.

5. It's important to have a great bra. If your bra doesn't fit it can make you look fatter or saggy. Go to (a good underwear store) and get professionally fitted.

6. Don't wear spaghetti straps if your arms are not toned. It's not a good look.

7. Avoid flesh-coloured tights. They're just so old-fashioned.

8. Don't squeeze your body into a size smaller because you don't want to admit you're a 12 or 14. Wear the correct size for your body shape. Squeezing into a pair of pants that are a size too small will only make you have a muffin top.