Life's a Happy Song" is an original song from the film The Muppets. The song is sung by Gary, Walter, and Mary, with a chorus of other Smalltown, USA residents (including Feist, Mickey Rooney, and others). A reprise of the song appears in the film's finale, featuring Kermit the Frog, Miss Piggy, Fozzie Bear, Gonzo, Scooter, Rowlf the Dog, Dr. Teeth and the Electric Mayhem, the Penguins, The Swedish Chef, Dr. Bunsen Honeydew, Beaker, Lew Zealand, The Newsman, Rizzo the Rat, Sam the Eagle, Beauregard, Crazy Harry, Sweetums, Thog, Link Hogthrob, Dr. Julius Strangepork, Wayne and Wanda, Beautiful Day Monster, Nigel, Lips, Trumpet Girl, the Hobos, Bobo the Bear, Uncle Deadly, '80s Robot and Statler and Waldorf outside The Muppet Theatre. The last couple of bars of the reprise are heard at the very beginning of Muppets Most Wanted.