I think it is relevant to make something clear: I am not a Muppets fan. I know Kermit (Cocas for the Portuguese people), I think Miss Piggy is cute, but I am not properly a fan for the Muppets show. Also, I am not fan of dramas. Yeah, IMDB says it is a Comedy, a Musical. Yeah, Musical it is. But it is a Drama. There are two or three jokes in more than 100 minutes of movie. The rest is just plain Drama.
As a side note, Amy Adams is just cute. That is why I chose this screenshot, with these subtitles… how can one just forget about her?