2017-05-02 That XX/Only One 【TVPP】Solar(MAMAMOO) - That XX, 솔라(마마무) - 그XX @Duet Song Festival 【TVPP】 Lee Suhyeon(AKMU) - 'Only One', 이수현(악동뮤지션) - '온리원' @Duet song festival Yehet...!!!