Mamamoo is a South Korean quartet that debuted in the early 2010s with musical stylings inspired by '90s R&B girl groups and Wonder Girls' retro-modern K-pop. Signed to the RBW (Rainbow Bridge World) label, they issued their debut effort, Hello, in 2014, later hitting the Korean and U.S. charts with their first full-length, 2016's Melting. Building momentum and evolving their sound, they hit a high with 2017's Purple EP. After breaking into the Japanese market, they issued their sophomore album Reality in Black in 2019. Solo endeavors and a subunit followed in the 2020s, with ...