Mine has been the Theme Song;
"Casper the Friendly Ghost the Friendlist Ghost you know!"
Why? Please Why? It is Almost as bad as when I got the Lavern and Shirley theme stuck in my head.
Or "I'm just a little black rain cloud.
Hovering over the honey tree.
I'm just a little black rain cloud
Pay no attention to little me.
Everyone knows that a rain cloud
Never eats honey, no not a bit
I'm just floating around, over the ground
Wondering when I will drip.
Sung by Pooh in one of the movies.
Ack! I am going Mad, Mad, Mad!