Day 15. A song that is a cover by another artist.
Jimi Hendrix - All Along The Watchtower.
I picked this song for two reasons: 1. It's awesome; 2. I was honestly shocked when I found out it was a cover - for years I thought it was Jimi's and had no idea it was originally by Bob Dylan. To be fair, I had no idea who Bob Dylan was before this discovery.