December 22nd, 2010
12:56 PM ET
The 26-year-old defends the "Hannah Montana" star on Twitter, writing, "Just read in the rags that apparently my mum thinks Miley is a bad influence on me, it could not be farther from the truth."
In fact, Osbourne adds, "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!"
The two have been spending a lot of time together in New Orleans on the set of their new action-comedy "So Undercover," and Osbourne says, " Miley and I have become really close...she made one mistake and trust me she has learned her lesson."
In the movie, Cyrus, 18, stars as a private investigator, who is hired by the FBI and sent to go undercover at a college sorority. Directed by Tom Vaughan, the movie is rumored to be released late 2011.
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