6. Dave Grohl & Tenacious D
Multi-instrumentalist (mentalist) Foo Fighter Dave Grohl ripped a shredding solo out of his backside on Tenacious D's debut hit 'Tribute' in 2002. he also looked pretty cool as the Demon in the music vid...
7. Kaki King & Foo Fighters
Acclaimed acoustic guitarist Kaki King played some tasty fingerpickin' on Foo Fighters' 2007 track 'Ballad Of The Beaconsfield Miners'
8. Aerosmith & Run DMC
The 1986 collaboration on 'Walk This Way' between rock titans Aerosmith and hip hop giants Run DMC has been widely credited as being the first ever rap rock song...
9. Eric Clapton & George Harrison
Clapton provided the beautiful wailing solo on the George Harrison-penned 'While My Guitar Gently Weeps', from The Beatles' legendary 'White Album' in 1968.
10. Jimmy Page, Tom Morello & P.Diddy
Jimmy Page donated the riff to 'Kashmir' for Mr Diddy (then Puff Daddy) to shout over for the 'Godzilla' soundtrack in 1998, and appeared in the official video. Tom Morello also remixed another version for the CD single, with additional live guitar parts from himself.