Rockers strike familiar poses

Let's play who's who! See if you can put the names to the faces and get all 4 right!

1) James Taylor and Brandon Boyd of Incubus
2) Layne Staley of Alice in Chains and Justin Timberlake
3) John Bonham of Led Zeppelin and Dave Grohl of Foo Fighters
4) Carlos Santana and Kirk Hammett of Metallica

Answers from top to bottm:
Layne Staley of Alice in Chains and Justin Timberlake

James Taylor and Incubus Brandon Boyd

Carlos Santana and Kirk Hammett of Metallica

John Bonham of Led Zeppelin and Dave Grohl of Foo Fighters