Introduction: Humanities biggest music star amongst the superior alien races of the galaxy is back in human space. His next tour will be his biggest yet, and countless obstacles need to be overcome. Playing in front of an audience that can't breathe human atmosphere, in a different gravity, with music shifted to alien ears' frequencies. Challenges both technical and inter-personal. And then there is one big problem...The setting is semi-hard Science Fiction. It contains speculative technology that goes beyond current scientific understanding, yet aims strongly to extrapolate rather than hand-wave, plus having explanations for its technology and consistent abilities and limitations.The story is set in the same universe as Intergalactic, but is independent and can be read on its own. I write the story assuming that readers have not read the previous one. If you have, Galactic Superstar is set a few years after the events in Intergalactic, and a few hundred light years away.New chapters are published as they are finished, so this will be sometimes slow and sometimes fast. If you follow, you will get notifications whenever a new chapter appears....