What is this South Korean-Chinese boy group formed by S.M. Entertainment in 2011 initially with several members and broke up a year later that released the song "Mama" in 2012?
Mama (Exo song) "Mama" is a song by South Korean-Chinese boy bands Exo-K and Exo-M. It served as their debut single and title track from their debut record "Mama" (2012). Available in both Korean and Mandarin, the song was digitally released on April 8, 2012, by S.M. Entertainment.
Sistar Sistar (, often stylized as SISTAR) was a South Korean girl group formed in 2010 by Starship Entertainment. The group consisted of Hyolyn, Bora, Soyou, and Dasom. Their debut studio album "So Cool" was released on 9 August 2011. Their second album, "Give It to Me," was released on 11 June 2013. Their biggest hits include "So Cool", "Alone", "Touch My Body", "Loving U" and "Give It to Me". Their fourth single, "So Cool," debuted at number one at "Billboard" Korea K-Pop Hot 100 singles chart.