Kristina Donnelly
From Muppet Wiki
Kristina Donnelly performed Baab the Sheep in Muppets From Space.
Kristina Donnelly had cancer, and thanks to the Make-A-Wish foundation, she was given the opportunity to be in Muppets from Space. She had originally wished to just be an extra, but some of the performers suggested giving her a choice between being an extra or an extra puppeteer, and she chose to be a puppeteer. She went uncredited.
Kristina Donnelly died shortly after the movie was released.
