Cube Entertainment's new family member, 'A Pink', finally made their debut on today's episode of MBC's "Music Core"! Comprised of seven members, the girls utilized their innocent and sweet looks to recreate the elf-like image their seniors S.E.S. and Fin.K.L. were famous for back in the 90s. Although their concept may seem simple upon first glance, the girls make up for it in talent. Their title track, "I Don't Know", was composed by hitmaker Super Changddai and features a classic melody unlike other idol music in the market. With their smooth vocals and cute choreography points, the girls are definitely rushing into the spring season with this sweet track. Check out their outdoor debut stage below! Source: Daum Music