Joi Chua or Joi Tsai (Chinese: 蔡淳佳; pinyin: Cài Chúnjiā, born August 3, 1978) is a Singaporean female pop singer. Chua debuted as a commercial singer in 1996 in "Extraordinary Singers Course" organized by Ocean Butterflies Production Company, where she was chosen from over 2000 candidates at its premiere audition to join the label as a trainee singer.