Singers Joey, Lee Sang Soon, MamaMOO, and Sunwoo Jung A are entering KBS broadcasting station for recording broadcasting program on June 1.
About MAMAMOO
Mamamoo is a South Korean girl group formed by RBW in 2014, composed of four members: Solar, Moonbyul, Wheein, and Hwasa. The group officially debuted with their single "Mr. Ambiguous" on June 18, 2014.
 Wikipedia