Whitney Houston tragically died of an accidental drowning in 2012, but her three brothers — John, Gary and Michael — have kept her memory alive.

Soul singer Cissy Houston, who was also known as the mother of pop icon Whitney Houston, died Monday morning. She was 91.

Cissy Houston, Grammy-winning singer and mother of Whitney Houston, has died, according to Gwendolyn Quinn, a representative for The Estate of Whitney E. Houston. She was 91.