Solar, a leader of MAMAMOO, has received much attention since her debut with her rich voice and solid vocalization. Her delicate sensibility was shown through the 'Solar Sensitivity' series, which was a remake of a masterpiece in the past. Besides, She held her first solo concert "Blossom" and all seats are sold out with her strong ticket power. In April 2020, she released her first solo album, 'SPIT IT OUT’. This album imprinted her unrivaled energy and proved her popularity by ranking fourth in initial sales volume of female artist solo album in Korea. In February 2019, she opened a YouTube Channel called "Solar Sido," which means various attempts by Solar, and continues to play in various fields as well as music. Currently, The channel has gained about 2.8 million subscribers and is now receiving a lot of favorable responses.