A Spectrum

His song preference is continually evolving...

Sing a song of sixpence- this would put him to sleep or get him to stop crying about 92% of the time when he was few months old.

The Farmer in the Dell- this song gets him to eat when he doesn't want to, which is very rare.

The Itsy-Bitzy Spider- will get him to stop crying at the present. He likes the hand motions especially the rain falling on his head.

I can always get him to stop crying in the car seat just by singing.

He also really, really enjoys the theme song to The Big Bang Theory. He'll stop whatever he is doing to turn a watch/listen to it. (Except when he's eating of course ;)

He's also fascinated by the theme to Star Trek Voyager except he always cries when the sun disappears and the name logo is revealed. It's bizarre. I don't know if he doesn't like the music at that point or if something on the screen scares him.