The next time you have concert tickets to give out, do this fun thing Rob and Joss, Froggy 92.9, Santa Rosa, CA did. It’s called “Sing the Mystery Song”. You guys place a hit record in a sealed envelope done by the artist. Don’t tell listeners what it is. Tell them to call and the moment you answer, they must start singing any song recorded by the artist. If the song they’re singing is the one you chose and is in the envelope, they win the tickets.