Miley Cyrus is having a party in the U.S.A. and Kelly Osbourne is by her side. The pair, who are working together on the upcoming movie, So Undercover, shared laughs and cupcakes in a photo posted by Osbourne on Twitter, despite rumors of a rift.

Osbourne addressed the rumors on her Twitter account, which stem from reports that Sharon Osbourne disapproved of Cyrus after the Hannah Montana star's now infamous bong video. Kelly Osbourne responded, tweeting, "Just read in the rags that apparently my mum thinks Miley is a bad influence on me it could not be father [sic] from the truth!"

She went on to add, "Actually it's the other way around Miley has us all on a health kick. Gym/early nights There really scraping the barrel on that one!" and "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!"

"Miley and I have become really close I'm sick of all the haters judging her she mad one mistake and trust me she has learned her lesson!" she continued in her rant. She then posted the above photo with the tweet, "This is how im a bad I influence on Miley I force her to eat cupcakes so I don't feel so bad about eating one!"

So Undercover is currently shooting in New Orleans and is scheduled to be released in 2011. —ISHITA SINGH

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