Miley Cyrus 'Has Learned Her Lesson,' Kelly Osbourne Says

'Miley is one of the most hard-working, respectful women I have ever worked with,' Osbourne tweeted about her "So Undercover" co-star.

[article id="1654053"]Miley Cyrus[/article] has courted and survived several controversies throughout 2010, the most recent being a video that made its way to the Web showing the teen star smoking from a bong. But her [article id="1651859"]"So Undercover"[/article] co-star Kelly Osbourne has taken to Twitter to defend the 18-year-old singer/actress.

"We are all having so much fun on set today. I looooove days like [this]!" Osbourne wrote on Tuesday. "Just read in the rags that apparently my mum thinks Miley is a bad influence on me. it could not be father from the truth! ... Actually it's the other way around. Miley has us all on a health kick. Gym/early nights. [They're] really scraping the barrel on that one!"

[article id="1651859"]Osbourne,[/article] who has faced her fair share of controversy over the years, went on to tweet, "This really makes me mad. Miley is one of the most hard working respectful women I have ever worked with. I am learning a lot from her!

Osbourne added, "Miley and I have become really close. I'm sick of all the haters judging her. She made one mistake and trust me, she has learned her lesson!"

The one-time reality star did admit that she and Cyrus have been indulging in one vice on the set. "This is how im a bad influence on Miley. I force her to eat cupcakes so I don't feel so bad about eating one!" she wrote, and attached a photo of Miley and herself munching on a couple of the sweet treats.

Osbourne's Twitter thread comes one day after news broke that the [article id="1651859"]Miley's parents are selling[/article] their marital home in Toluca Lake, Calif. Cyrus was recently spotted shopping in New Orleans during a break from filming "So Undercover," where she reportedly chatted with makeup artist Denika Bedrossian about a new tattoo she got.