We Are Number One first appeared in LazyTown, the Icelandic children's television series, sung by Robbie Rotten and his lookalike henchmen in a 2014 episode. The song became a major meme in 2016, when remixers, charity streams and fan edits spread it far beyond the show, partly in support of actor Stefán Karl Stefánsson during his illness. Crusades edits later gave the track a medieval battle flavour, pairing the triumphant chorus with knights, marches and mock serious conquest jokes that still circulate in short meme videos today.