"zimzalabim" ( is a song recorded by south korean girl group red velvet, released on june 19, 2019, by sm entertainment. the track acts as the lead single for their sixth korean extended play "", released simultaneously with the single and is the first track on album. composed by olof lindskog, daniel caesar, ludwig lindell and hayley aitken, the electropop song features various genres and showcases an extravagant soundscape.