Robert Bernard Sherman was an American songwriter who specialized in musical films with his brother Richard Morton Sherman. According to the official Walt Disney Company website and independent fact checkers, "the Sherman Brothers were responsible for more motion picture musical song scores than any other songwriting team in film history." Some of the Sherman Brothers' best known songs were incorporated into live action and animation musical films including: Mary Poppins, The Jungle Book, The Many Adventures of Winnie the Pooh, Chitty Chitty Bang Bang, The Slipper and the Rose, and Charlotte's Web. Their best-known work, however, remains the theme park song "It's a Small World (After All)". According to Time.com, this song is the most performed song of all time.