Ievan Polkka is a traditional Finnish polka that became famous worldwide through Loituma's energetic performance and the early internet leekspin meme, in which an animated character spun a spring onion to the tune. A later Vocaloid rendition sung by Hatsune Miku gave the melody a new, high-pitched digital voice and spread widely on Nico Nico Douga and YouTube, where fans reused it in dances, animations and remixes. Its simple, repetitive melody and relentless tempo have kept it recognisable across generations of meme culture.