Slash is one of the greatest and most recognizable guitarists in history. His cacophonous style, culled from seemingly all of rock's great axemen—from Jeff Beck to Jimi Hendrix to Ron Wood—made him an icon of Guns N' Roses and Velvet Revolver. So it's no surprise that stars like Eazy-E, Michael Jackson, Rihanna, and Iggy Pop have asked him to make instrumental appearances in their songs.