The Cranberries meet the Phantom of the Opera...

I like to encourage appreciation of all kinds of music, which sometimes leads to some interesting spontaneous mash-ups in the oddest of ways. 

9 y/o (singing happily while performing some task): ♫♫ Zombie! Zombie! Zombie - ie - ie - oh - oh! ♫♫

11 y/o (completely unprompted, and with an overly dramatic voice, a-la the Phantom, from The Phantom of the Opera): Sing, my angel of music!

9 y/o (perfectly on beat, switches to the music of the night, from Phantom): ♫♫ Aaahh - aa-aa-  ah-ah-ah-aaah - aaaah! ♫♫