Apart from the fact that Miley Cyrus really seems grown up (she is still a KID),
this is also a great example of video advertising as done by Yahoo on
their new site http://new.music.yahoo.com/
making it like You Tube but maybe with more embeddable videos for open sharing
PS the Video is here
http://new.music.yahoo.com/Miley-Cyrus/videos/view/Party-In-The-U-S-A—218591175