If there was ever any doubt that Disney darling Miley Cyrus was being schooled at the Britney Spears and Lindsay Lohan school of screw-ups, those doubts have been allayed. Proving she's going down the same destructive path as the tweens before her, the Hannah Montana star is now embroiled in controversy surrounding a video that shows her getting stoned off the natural herb salvia, which some experts have compared to LSD. When dad Billy Ray Cyrus said he had high hopes for his 18-year-old daughter, we're pretty sure this is the last thing he had in mind. The video, which was supposedly stolen from Cyrus' camera, shows the actress-singer smoking the natural and legal herb out of a bong. Billy, who's currently divorcing Miley's mom Tish, was devastated by the footage, which was released by TMZ. He issued the following statement via Twitter, "I had no idea. Just saw this stuff for the first time myself. I'm so sad. There is much beyond my control right now." In other words, it would be pretty hard to ground the child star now that she's legally an adult. Although Cyrus didn't break the law, it's obviously another blemish on her reputation which has been stained by age-inappropriate actions over the last few years. From steamy photo shoots to dirty dancing, the tween queen has seen a major fall from grace as she continues to sow her oats. Ironically, she's probably the only person who's not fazed by the scandal. According to TMZ, Miley showed up to film her latest project So Undercover just hours after the story broke.