Chester Bennington, who also sang with the Stone Temple Pilots, was reportedly found hanged at his home just before 9AM today.
Dave Rosser announced he had inoperable colon cancer in last October.
Grainge signed hitmakers like Sinead O'Connor, the Boomtown Rats, the Waterboys and World Party.
Soundgarden, Audioslave and Temple of the Dog singer Chris Cornell has suffered a "sudden and unexpected" death at age 52.
Keith Mitchell played on all four Mazzy Star albums.
C'el Revuelta played with Black Flag in 1986 and again in 2003.
The Jamaican musician recorded three albums as an original member of the British ska-pop band.
Grandaddy bassist Kevin Garcia has passed away at the age of 41 after suffering what's being described as a "massive stroke."
Jonathan Demme, an Oscar winner for 'Silence of the Lambs' and 'Philadelphia,' had been battling cancer since 2010.
Sylvia Moy, who was Motown's first female writer and producer, co-wrote many hits for Stevie Wonder.