1. Open a music player. 2. Go to 'all music'/'library'. 3. Hit shuffle/repeat/randomise. 4. Find photos of the first 10 artists/bands that come up [no repeats and no cheating]. 5. Have people guess who the artists/bands are.
I caved - but I hope this is a challenge, hell, I didn't even know what some of these bands looked like. And no, I did not cheat. My musical tastes are really this random.