Kim Hyung-seo (Hangul: 김형서, born September 27, 1998), better known by the stage name Bibi (비비; stylised in all caps), is a South Korean singer-songwriter. In 2017, she signed with Feel Ghood Music after Yoon Mi-rae discovered her self-produced songs on SoundCloud. She appeared as a contestant in SBS show The Fan, where she eventually finished in second place. She made her official debut through releasing a single "Binu" on May 15, 2019.