从一开始，凯蒂就成了受害者。简、露娜和乔安娜轮番挠她痒痒，其他人则在一旁围观大笑。凯蒂试图反抗，扭动着身体，一边咯咯笑着一边哀求，但每次挠痒痒开始，她都会彻底失去控制。

每一轮结束后，气喘吁吁的凯蒂都要选出谁出局，那个没能让她笑够的人就是最弱的一环。

最后，只剩下两个女孩。她们在最后一轮决胜局中展开较量，使出浑身解数，力求激起凯蒂最强烈的反应。在笑声、抱怨和无情的攻击中，凯蒂最终决定了谁才是比赛的绝对赢家。

凯蒂以为挑战结束了？但就在她放松下来的时候，三个女孩突然扑向她，同时挠她痒痒，她们笑着享受着这一刻，直到最后一刻。Katie is the victim from the very first second. One by one, Jane, Luna, and Johanna take their turn tickling her while the others watch and laugh. Katie tries to resist, squirms, begs between giggles, and completely loses control every time the tickling starts.

After each round, still breathless, Katie has to choose who is out of the competition, the one who didn't make her laugh enough is the weakest link.

In the end, only two girls remain. They face off in the final, decisive round, giving it their all to provoke the strongest reaction from Katie. Amid laughter, complaints, and relentless attacks, Katie decides who the absolute winner of the competition is.

Katie thinks the challenge is over? but when she relaxes, the three girls pounce on her and tickle her simultaneously, laughing and enjoying the moment until the very end.