"The Muppets" are welcoming a special guest Tuesday (Dec. 1) in Joseph Gordon-Levitt, one of the best song-and-dance men in the biz.

JGL is dueting with Miss Piggy on "Up Late," singing the jazz standard "Fly Me to the Moon," made most famous by ol' blue eyes himself, Frank Sinatra," in 1964.

But of course, this is "The Muppets," which means rehearsals are kind of a disaster. Gonzo gets caught in the rigging, causing the giant moon set piece to swing dangerously back and forth as Gordon-Levitt and Piggy try to keep singing. The show must go on, right?

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It's also hilarious to watch the two singers dodge a giant moon that keeps swinging between them, threatening to knock either one over at any moment.

Elsewhere on Tuesday's episode, titled "Going, Going Gonzo," Gordon-Levitt joins Scooter, Pepe and the gang for poker, Dave Grohl challenges Animal to a drum-off and Gonzo gears up for his dream stunt.

"The Muppets" airs Tuesdays at 8 p.m. ET/PT on ABC.

Posted by:Andrea Reiher

TV critic by way of law school, Andrea Reiher enjoys everything from highbrow drama to clever comedy to the best reality TV has to offer. Her TV heroes include CJ Cregg, Spencer Hastings, Diane Lockhart, Juliet O'Hara and Buffy Summers. TV words to live by: "I'm a slayer, ask me how."