The line comes from Pinkie Pie, the energetic pink pony in My Little Pony: Friendship is Magic, a series that began in 2010 and built a large online fan community. Fans clipped her short, distinctive catchphrases for soundboards and reaction videos, where a one-second burst of enthusiasm was easier to reuse than a full song or scene. Because the phrase is instantly recognisable to viewers who know the show, it survived as a shorthand for cheerful agreement in edits, streams, and meme compilations long after its first television run.