Highly animated

As a kid, where music and animation wer concerned, I thought this was the trippiest combination of the two I'd ever come across

Pink Elephants On Parade (from the movie Dumbo)



...and this was the spookiest (start from about 0:40 seconds to 2:30).

Are You Happy? (from the movie Jack And The Beanstalk)



But you know what? Neither of them can hold a candle to this classic.

Minnie The Mooch (featuring Cab Calloway-and Betty Boop and Bimbo!)