Miley Cyrus is a pothead -- or so she says.

During her 19th birthday bash, Miley -- who was caught on video smoking salvia on her last birthday -- told her guests, 'You know you're a stoner when your friends make you a Bob Marley cake.'  And, yes, that was caught on tape, too.

Kelly Osbourne, who threw the party for Miley, said her pal was just joking. Kelly tweeted, 'Let me make something very clear after Miley's salvia incident -- we started calling her Bob Miley as a joke! The cake was also a joke! It makes me sick that Miley's so-called 'friends' would sell her out and lead people to believe she is someone that she is not!'

Judge for yourself as to whether or not it was a joke. 

Source: The Daily