"Zimzalabim" () is a song recorded by South Korean girl group Red Velvet for their sixth Korean extended play The ReVe Festival: Day 1, which acts as the first installment of the group's The ReVe Festival trilogy. Primarily an EDM-influenced electropop track that resembles a "colorful parade" and showcases an extravagant soundscape, the song was composed by production duo Caesar & Loui, Ollipop and Hayley Aitken with Korean lyrics adaptation by lyricist Lee Seu-ran, which tells the listeners to "unfold a dream" that is "held deeply" in their heart. Accompanied by an amusement park-themed music video, it was released on June 19, 2019 by SM Entertainment as the lead single for Day 1, and subsequently the first single from The ReVe Festival trilogy. Upon its release, "Zimzalabim" polarized music critics over its "genre-hopping" composition. While some felt the song was a "downhill" from the group's previous experimenting tunes, others saw the song as a sonic roller coaster ride and praised its "energetic, anthemic" sound. It also attained moderate success, becoming their first lead single to miss the top ten on Gaon Digital Chart, peaking at number eleven, while earning Red Velvet their fourteenth consecutive top-ten entry on Billboards World Digital Songs chart. The song also marked the group's first chart appearance in Oceania, peaking at number thirty-nine on New Zealand Hot Singles Chart. Background and release Following the release of their second Japanese extended play Sappy on May, SM Entertainment shared the first preview of The ReVe Festival through social media accounts on June 4, 2019 The word "Zimzalabim" was revealed on June 8 to 9 through the videos posted on Red Velvet's official social media accounts. The group released a trailer video on June 10 which announced the full-scale start of The ReVe Festival through their YouTube and V Live channels. It was revealed that SM Entertainment chief producer Lee Soo-man has been holding the song for a while, but strongly suggested that the group was ready to pull the track off as a title song. The song had its official digital release on June 19, 2019, along with The ReVe Festival: Day 1. Composition "Zimzalabim" was composed by Olof Lindskog, Daniel Caesar, Ludwig Lindell and Hayley Aitken. In an email interview with The Korea Herald, Daniel Caesar and Ludwig Lindell under the name of Caesar & Loui revealed that the song was inspired by Girls' Generation's "I Got