Curtain Call Encores?

I'm currently in a rabbit hole of the post-Curtain Call encores the cast of The Color Purple did.

I Won't Complain for Heather Headley's last performance

Purple Rain to honor Prince's passing

Total Praise on closing night

That's What Friends Are For for Jennifer Hudson's last performance



First of all, are there other examples of the star, much less the entire company performing some sort of encore after the curtain call? Especially so many times over the course of the run?

I find it fascinating, and what a special moment for the audience.