Club 27 is a list of celebrities who have died suddenly at the age of 27. Also many others have gone at the age close to that. Usual explanations are drugs, mental health issues etc...

My belief in coincidences these days being almost non-existent, I assume it is quite possible that almost all of those were not really accidents.

The basic idea is this: not a single star is being allowed to be popular and uncontrolled at the same time. So, when someone starts to get really big, they try to get them under control. If that is not successful (in other words, the star refuses to sell out) they either cancel or simply unalive them.

As for the reason: it is only logical that big stars and celebrities have power to influence and emotionally move large masses of people in a very short amount of time. TPTB simply cannot allow such power to go unchecked, so it is of paramount importance for them to control it. If they can't put this power under control, they use any other method to neutralize it.

Which basically means that almost any A list celebrity, who's still alive and not cancelled, is sold out and completely under control of TPTB.