Livingston and Evans, both members of ASCAP, won three Academy Awards, in 1948 for the song "Buttons and Bows", written for the movie "The Paleface"; in 1950 for the song "Mona Lisa", written for the movie "Captain Carey, U.S.A."; and in 1956 for the song "Que Sera Sera", featured in the Alfred Hitchcock movie "The Man Who Knew Too Much" and sung by Doris Day. Another popular song that he and Livingston wrote for a film was the song "Tammy", written for the 1957 movie "Tammy and the Bachelor". The song was nominated for an Academy Award for Best Song. Livingston and Evans also wrote popular TV themes for shows including "Bonanza" and "Mr. Ed". Their Christmas song "Silver Bells" intended for the 1951 Bob Hope film "The Lemon Drop Kid", has become a Christmas standard.