Remembering Signe Toly,
The original Jefferson Airplane singer

Signe Toly interview:

“Chauffeur Blues”
Jefferson Airplane
final performance with Signe Toly

Jefferson Airplane reunion w Signe 
2011
“It’s No Secret”

From Wikipedia 

Signe Toly Anderson born Signe Toly September 15, 1941 – January 28, 2016) was an American singer who was one of the founding members of the American rock band Jefferson Airplane.

… 

Anderson died at her home in Beaverton, Oregon at the age of 74 on January 28, 2016, from the effects of chronic obstructive pulmonary disease (COPD).[2]

She died on the same day as Airplane co-founder Paul Kantner.