branded herself a "stoner" at her birthday party, joking that she smokes "way too much weed".
The 19-year-old star - who was criticised last year when a video emerged of her smoking legal hallucinogen Salvia through a bong water pipe - made the crack when pals presented her with a Bob Marley
birthday cake at the bash at Beacher's Madhouse inside the Roosevelt Hotel in Los Angeles last Tuesday (22.11.11).
In a video obtained by website The Daily, she is seen saying: "You know you're a stoner when your friends make you a Bob Marley cake. You know you smoke way too much f**king weed!"
Her pal Kelly Osbourne
replied: "I thought salvia was your problem!"
A spokesperson for the singer-and-actress - the daughter of Billy Ray Cyrus - denied Miley was referring to her own drug use in the video, and claims the incident has been taken "out of context".
They said: "It's all been taken out of context. The cake was a joke and Miley's response was intended to be sarcastic."
Kelly - who organised the bash for Miley - later took to her twitter page to defend the comments in the clip and slam the supposed friend who leaked the footage.
She wrote: "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.
"It makes me sick that @Miley Cyrus 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.' (sic)."