My 20 month old son loves musicals. He even tries to sing and do some of the moves. I doubt it comes from me. I recall hating musicals as a child. I was more of a smash-vases-with-a-hammer kind of toddler. We actually got rid of our TV, partly so our toddler wouldn't be exposed to it so much.* However, he quickly discovered that one can just as easily watch movies on computers, so he still gets to see them from time to time.
*The other reason we got rid of our TV was because Futureshop sales reps tried to pull a fast one on us when brought a faulty TV within warranty for a replacement and they tried to give us a downgrade while lying and calling it an upgrade. Never trust Futureshop sales reps. They lie a lot. A lot, without blinking an eye. Confront them with facts and documentation to expose their lies and you won't even witness any reddening of the face nor any other hint of embarrassment.