Here's a video of international Disney channel superstar Miley Cyrus acting her age. Of course, by "acting her age," we mean she's doing a bong hit like a completely normal 18 year old. Who cares? According to TMZ, it was recorded at a Los Angeles party at her house five days after her 18th birthday. Also, TMZ's source reports that's not marijuana in the bong; it's the legal psychedelic herb salvia. Cyrus has to be annoying to smoke up with. How mad do you think she is at her friend recording the video who says, "I'm going to doc*ment the shit out of this." Hannah Montana be trippin'... literally, for all the world to see. Personally, I'm just baffled she's getting high to Bush's "Come Down" (before the track changes to The Eagles). I know I'm old and everything, but are the kids really still blazing trees to Gavin Rossdale these days? Even influential tastemakers like Cyrus out in Hollywood? Really?! Shocking. Video after the jump.

What the over / under on the days/weeks/months/years until a true nekked pictorial?