K-Pop super-group Cosmic Girls steal the spotlight with their sassy kaleidoscope of sound. Also called WJSN (for Wonder, Joy, Sweet and Natural—the troupe's four units) each of the 13 members matches synchronised dance moves to sugary-sweet vocals. Their debut EP, Would You Like? (2016), broke into the Top 10 thanks to singles “Tick-Tock” and “Catch Me”, displaying the group's ability to craft infectious electro-pop from bright, mellow beats and hip-hop rhythms alike. Later work, like R&B-influenced slow jam “Good Night”, shows off smooth, tender harmonies—and their usual ear-worm hooks.