In a new video from Miley Cyrus’ 19th birthday party, she admits she’s a stoner… but is it all a joke?

Cyrus received a Bob Marley cake at her Beacher’s Madhouse Club bash in Los Angeles, where she commented, “You know you’re a stoner when friends make you a Bob Marley cake – you know you smoke way too much f***in’ weed.”

Kelly Osbourne, who threw Cyrus the party, added, “I thought salvia was your problem.”

No worries though, as Osbourne took to Twitter to set the record straight… it was a joke, guys!

Osbourne tweets: “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 @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”