I dreamt of a Fun House!

I dozed off while watching hongkong drama serial on my laptop. The setting of my dream was in my granny's place and as I walked out to the hall, the television was playing "Funhouse". After I woke up from my dream, this song keeps playing in my head non-stop, like on auto-replay. Even when someone talks to me, the song continues to 'play' in the background. The weirdest thing is I don't listen to this song often and I don't remember watching the mtv, so why does it keep playing in my head