Another little idea: The girls have a slumber party with some friends. Truth or Dare occurs. Naughty dares commence. Eventually Bubbles or Buttercup ends up being dared to walk outside in just a towel. But as Bubbles/Buttercup walks out, the other girls rip her towel away and lock her out naked. Hilarity and humiliation ensues as she tries to get back into the house. A lot of chaos can happen, like, she almost gets caught by the neighbor as she tries to get in through a window. She has to hide throughout the neighborhood as she seeks help. And then finally makes a big scene in front of the house, threatening to destroy the entire front of the house to get back in, and she doesn't realize she is drawing a crowd until it's gigantic. Surrounded by people, she's frozen in humiliation for a moment before rushing the front door and causing a mess.
Definitely sounds like a good one for Buttercup.