When he was asked to write a song for the Singles soundtrack, Mark thought the Seattle grunge scene was already overblown, so that's what he wrote about.
The Third Day frontman talks about some of the classic songs he wrote with the band, and what changed for his solo country album.
There are no more rock stars - the last one died in 1994.
Have you got the smarts to know which of these graduation song stories are real?
As a 5-year-old, Brandi was writing lyrics to instrumental versions lullabies. She still puts her heart into her songs, including the one Elton John sings on.
A top country songwriter, Barry talks about writing hits for Little Big Town, Tim McGraw and Jason Aldean.