Slash's solo in Sweet Child O'Mine, but big mentions to:
* Zakk Wylde' in 'Old LA Tonight' (Ozzy Osbourne)
* Myles Kennedy/Mark Trementi in 'Blackbird' (Alter Bridge)
* Marty Friedman in 'Tornado of Souls' (Megadeth)
I must have spent half my teenage years playing air guitar to Megadeth and Metallica records. Marty had some amazing solos, even listening back now they still sound so dramatic and energetic. Loved all the stuff on the 'Youthanasia' album in particular!