Bowie was diagnosed with liver cancer in mid-2014. The phrase "Blackstar" is a type of a cancer lesion. The music video for "Blackstar" is chockful of visual references to the idea of death and illness. Bowie knew he was sick and that he might die, so he "used" this grief, pain, and raw emotion to inspire his work.Bowie kept his cancer secret until his death. Nice try though.
You clearly know jack-shit about music since you're trying to find gotcha moments where there aren't any.