Is he confirmed switching her shoes for her? It doesnt look like her legs are really moving as they would if someone is pulling their feet out of shoes. As far as the belly goes, definitely not a tickle, and I can say that with a lot of certainty. I rewatched the video almost 6 or 7 times now and his hand doesn't even move on her stomach. No tickles at all.
She does look down after the random smile so who knows, but as of right now, it's too inconclusive for us to break out into celebration.
Edit: Youre right. They are changing her shoes and she is barefoot/in nylons on stage. I have what I assume is the same routine from a different angle where you can see everything (not the same clip, same routine...) youtube.com/shorts/6EGSBbhzgPE?si=9rw6iwdVJ404eczT
Still, too inconclusive to celebrate. We couldn't see anything, so unless someone can find this exact clip from a better angle, we'll never know