When Your Happy you hear music..when your sad..you understand the lyrics...

https://www.youtube.com/watch?v=BphrCg8SDFI

https://www.youtube.com/watch?v=FgR-OKcqL0g

https://www.youtube.com/watch?v=SfC4Ji21ha4

https://www.youtube.com/watch?v=TtHZs4GrarY