A character addressed only as a "girl pirate" appears in the Muppet Treasure Island Sing Along home video.
She shows up to tell Kermit that he makes a great pirate. When Bad Polly asks her how she would know, she says that she herself is a pirate. The other pirates, not believing that a girl can be a pirate, scoff at this suggestion. In response, the girl breaks into song and makes her case as a "Real Pirate".
Later, in "Let the Good Shine Out", she when he sings about giving love and having it come back to you.