*You* didn't get him a Lamborghini for his birthday, so of course his feelings are hurt, and he's acting out. Singing a duet with Weed-Fiend Miley is a little extreme, though. Next thing you know he'll be recording a Christmas album with Charlie Sheen.
This does bring up a good point about a feature that should be added to blogtown: the ability to filter out blogtown posts by their tags. That way we can just filter out the bieber fever posts.
Maybe it will include a remix of that hot Romeovoid song from the 80s. Justin and Miley looking at each other lustfully whilst they exclaim "I might like you better if we slept together". Now that would be something!