The rules:
1. Open a music player.
2. Go to 'all music'/'library'.
3. Hit shuffle/repeat/randomise.
4. Find photos of the first 12 artists/bands that come up [no repeats and no cheating].
5. Have people guess who the artists/bands are.
il kill those who dont know these.
Meh play around with how many you want i just did it till i got bored
with it. Should be able to get most of em easy peasy i think!