A hacker with a sense of fun hijacked Dallas's tornado sirens during a test, making them play the classic theme from SpongeBob SquarePants. Nobody knows who did this or why, but the internet loves it.

If television shows are a gift, then a good theme song is like the color-coordinated bow on top. Be it jingles made for the show or pre-existing pop songs the producers obtained the rights for, a good ...