Since emerging from MySpace with her hit "Bubbly," Colbie has become a top songwriter, even crafting a hit with Taylor Swift.
Songs that seem to glorify violence against women are often misinterpreted - but not always.
"25 or 6 to 4" to "Semi-Charmed Life" - see if you can spot the songs that are really about drugs.
Before he was the champ, Ali released an album called I Am The Greatest!, but his musical influence is best heard in the songs he inspired.
It started with a bouncy MTV classic. Nirvana and MCR made them scary, then Gwen, Avril and Madonna put on the pom poms.
The Yardbirds drummer explains how they created their sound and talks about working with their famous guitarists.