Back in January, Sse Sse Sse appeared as surprise guests on JTBC's 'Sugarman 2', where Lim Eun Sook confessed that her breast cancer had developed into a stage 4 and that she chose to appear on the show to "keep my promise with my daughter. To make one last memory with my group members." 

At the news of the late Lim Eun Sook's passing, various 90s singers expressed their condolences. Red Velvet, who appeared together with Sse Sse Sse during 'Sugarman 2' and remade Sse Sse Sse's song, also expressed their condolences via Instagram. 

We offer our condolences to her family.