Credit: PETER STEFFEN/AFP/Getty Images

Chillax, dudes: Miley Cyrus was totally not serious about her pot-smoking habits.

In a video recently acquired by The Daily, the 19-year-old singer was feted at a Tuesday birthday party with a Bob Marley-themed cake that suggested she was a big fan of marijuana.

"You know you're a stoner when your friends make you a Bob Marley cake," the former Disney star said in the video. "You know you smoke way too much f-cking weed!"

It was all in good fun, Cyrus' rep tells Us Weekly. "It's all been taken out of context," her rep says. "The cake was a joke and Miley's response was intended to be sarcastic."

It was nearly a year ago that Cyrus was caught smoking legal hallucinogen salvia from a bong.

Cyrus' BFF Kelly Osbourne -- who threw the bash at Beacher's Madhouse -- also defended her pal via Twitter.

"The cake was also a joke!" Osbourne tweeted. "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!"