Miley Cyrus likes to party, is really GD annoying

Miley Cyrus celebrated her 18th birthday by smoking salvia out of a bong and then being completely insufferable, according to this video from TMZ.

The video was shot during a party at Miley's L.A. area home 5 days after her 18th birthday.
According to a source connected with Miley ... the smoke filling the bong is a natural herb called salvia which has psychedelic qualities. Possession of salvia is legal in California.
As for the video ... the source tells us it was shot by one of Miley's friends --  and the theory is someone stole or copied the video from that friend's camera.

If you thought Miley was annoying sober, you were right. But more to the point, wait until you see how irritating she is when she's high. At first she just starts giggling for no reason, then she starts babbling like some kind of demon. Stuff like this is why I hardly ever date high school seniors anymore.