Jimi Hendrix and Amy Winehouse, Jimi Hendrix and the maths that explodes the 27 club

What do Otis Redding, Gram Parsons, Nick Drake, Jimmy McCulloch, James Ramey (aka Baby Huey), Bryan Osper, and Jon Guthrie have in common?What about Tim Buckley, Gregory Herbert, Zenon de Fleur, Nick Babeu, Shannon Hoon, Beverly...