To mark Make A Difference Day, Patrick Foster and Jim Lenahan look back at times when rock stars lent their voices to causes. The most notable examples were a string of singalong charitable singles in 1985, including "We are the World."

Dad Rock is a music podcast from USA TODAY, available on iTunes, SoundCloud, Stitcher and TuneIn.

Learn more about Make A Difference Day at makeadifferenceday.com

Learn more about Dad Rock at dadrock.usatoday.com

Follow Dad Rock on Twitter @DadRockShow

Email Patrick and Jim at [email protected]

Leave a message on the Dad Rock Hotline: 571-424-1984