Day 10:
Play something appropriate for the apocalypse, or that you’d be willing to throw at a Zombie, Shaun of the Dead style.
Various - Until The End of The World
Day 7:
Play something based on a folk tale or fairy tale.
Irish folk music roots and a fairy tale of New York.
The Pogues - If I Should Fall From Grace With God
Day 5:
Play something with a hidden track or secret embedded in the packaging.
To hear ‘Me, White Noise’ you have to rewind from the start of track one.
I find this doesn't work in every player.
Blur - Think Tank