Bertha Beasley and Her Galloping Geese
From Muppet Wiki
Bertha Beasley and Her Galloping Geese were scheduled to be the opening act on episode 120 of The Muppet Show until Valerie Harper, in a bid to get to perform the opening number herself, sabotaged Bertha by covering her with birdseed. Poor Bertha never made it to the theater, and Valerie sang "Broadway Baby" in her place.

