When a song is stuck in your head.

[Cascade]

Pretty funny video--http://www.juliansmith.tv/2011/07/stuck-inside-your-head/

EDIT:Also another funny video by the same guy--http://www.juliansmith.tv/2011/07/moving-out/

[Phoenixking]

look up words words words on youtube O.o or oh bo now that is funny or you can look for parody of E.T.

[WoundedEagle]

look up words words words on youtube O.o or oh bo now that is funny or you can look for parody of E.T.
Copy cat! You love it! And look up Im bo yo..

[LIGHTNINGLORD67]

Lol!.