Mamamoo( Korean :마마무; stylized asMAMAMOO) is a four-member South Korean girl group under the management of WA Entertainment . The group consists of members Solar, Moonbyul, Wheein, and Hwasa. They officially debuted into the Korean entertainment industry on June 18, 2014 with the song "Mr. Ambiguous."Their debut is considered one of the best K-pop debuts of 2014.