Kelly Osbourne has come a long way from the goth girl who appeared on MTV's "The Osbournes" -- and her frame keeps shrinking!

The stylish "Fashion Police" star hit the red carpet at the W LOVE Hangover Ball at W Union Square last night in New York, where she sported her skinniest look ever.

The dress' form-flattering print and cinched waist made her look thinner than ever ... not that she needs the help.

Kelly has lost a ton of weight since rising to fame when her reality show debuted 10 years ago and recently showed off her killer bod in a bikini while celebrating brother Jack's wedding in Hawaii.

See more of Kelly's skinny style in the gallery above.

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