When he joined Guns N' Roses in 1990, Matt helped them craft an orchestral sound; his mezzo fortes and pianissimos are all over "November Rain."
David talks about videos he made for Prince, Alabama, Big & Rich, Sheryl Crow, DMB, Melissa Etheridge and Sisters of Mercy.
The former Metallica bassist talks about his first time writing a song with James Hetfield, and how a hand-me-down iPad has changed his songwriting.
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.
Jim talks about the impact of "The Middle" and uses a tree metaphor to describe his songwriting philosophy.
When Judd Apatow needed under-appreciated rockers for his Knocked Up sequel, he immediately thought of Parker, who just happened to be getting his band The Rumour back together.