Put it right after the reveal shot, once the outfit or new look is fully on screen, then follow it with Oh My God Wow for the reaction and Nelson's Ha-Ha! to close the joke with a shared laugh.
About this sound
This is a short spoken clip, about four and a half seconds long, in which a voice says the Portuguese line 'tu tá um vadinho hoje ein'. It feels lighthearted and teasing, like a playful callout aimed at someone who is looking especially good today.