The audio is identified as Dizeres by Lourena and Sant, from Orgânico Verão #1, with this version shared online as the Undaia Song in a higher alto pitch. That pitched treatment helped it circulate separately from the full track as a short, reusable clip for edits and reactions. Listeners recognise the sung hook even without the original context, so the sound works as shorthand for exaggerated feeling in short videos. Its appeal comes from the gap between the sincere delivery and the playful, raised vocal tone.