The Scorpions and UFO guitarist is also a very prolific songwriter - he explains how he writes with his various groups, and why he was so keen to get out of Germany and into England.
dUg dIgs into his King's X metal classics and his many side projects, including the one with Jeff Ament of Pearl Jam.
Scaramouch, a hoople and a superhero soundtrack - see if you can spot the real Queen stories.
Eddie (played by Johnny Depp in the video) found fame fleeting, but Chuck Berry's made-up musician fared better.
Greg talks about writing songs of "universal truth" for King Crimson and ELP, and tells us about his most memorable stage moment (it involves fireworks).
The Evanescence frontwoman on the songs that have shifted meaning and her foray into kids' music.