The sound comes from Brazilian funk artist MC Lan, whose 2017 release built around the Oh Xanaina chant circulated on soundboards and in short-form edits. Funk carioca hooks like this travel well because they are short, rhythmic and instantly recognisable even to listeners who do not know the full track. Over time the oooh refrain became a standalone reaction and party cue, reused in dance videos, memes and remixes rather than only as part of the original song. Its lasting appeal is that simple chant structure, which fits a quick cut without needing context.