Amy the Dancing Brick

From Muppet Wiki

Amy the Dancing Brick is not a Muppet. She is an actual brick. Despite her name, she does not actually dance.

Gonzo, however, speaks to her as if she were alive, apologizing when he can't drum up enough of an audience for her act at the Bitterman Plaza mall in the alternate universe in which Kermit had never been born in It's a Very Merry Muppet Christmas Movie.

When Kermit interrupts Amy's act in the movie, he scares off a potential customer played by Drew Massey in a cameo role.