The former Disney star was filmed at her 19th birthday party on November 22 saying: “You know you’re a stoner when your friends make you a Bob Marley cake -- you know you smoke way too much f***in’ weed."
As RadarOnline.com previously reported, after Miley’s risqué comment, Kelly jumped straight in, quipping: “I thought salvia was your problem, Miley."
After a firestorm erupted, Osbourne took to Twitter, claiming that Miley’s pot comments were a joke and that she isn’t a marijuana smoker: “Let me make something very clear after @MileyCyrus salvia incident we started calling her Bob Miley as a JOKE! The cake was also A JOKE.”
That set off haters, who sent Kelly nasty Tweets, prompting Miley to jump to her defense: “Please stop bombarding my friends twitter pages with rude comments. NOTHING gives you the right to threaten people. I love u @MissKellyO :)"
Kelly also wrote: “It makes me sick that @MileyCyrus so called 'friends' would sell her out and lead people 2 believe she is someone that she is not!
"U guys if @MileyCyrus is not recording/filming/touring she is works everyday how could she possible do all that if she was a stoner! #think."
The Hannah Montana star came under fire previously for alleged drug use after she was caught on video last year, smoking the legal hallucinogenic herb, Salvia, out of a water pipe.
"I'm having a little bit of a bad trip," a disoriented Cyrus said in the video. "Is that a Liam look-alike -- is that my boyfriend? Is that me tripping? Does that look like Liam at all? I want more of that s---."
She later apologized to her fans, telling Marie Claire magazine: "For me it was a bad decision, because of my fans and because of what I stand for."