Today is Kelly Osbourne's 31st birthday!
The TV host has been in the spotlight since she was a child, but really rose to fame when her family's MTV reality series The Osbournes started in 2002. Over the past decade, Kelly's weight has fluctuated and her style has definitely evolved.
RELATED: Aimee Osbourne Admits She's No Longer Close to Famous Siblings Kelly and Jack
Click through the gallery to see her extreme transformation over time.
"We were very different [from the Kardashians]," Kelly said. "They are the most beautiful family in the world and we’re all just a bit rough around the edges but in the best way possible."