Question: Heidi's Song is a 1982 American animated musical feature film whose voice cast included an American singer who at the age of three began his career in what?

Mary and Max is a 2009 Australian stop motion animated comedy-drama film written and directed by Adam Elliot as his first animated feature film with music by Dale Cornelius and produced by Melanie Coombs and Melodrama Pictures.  The voice cast included Philip Seymour Hoffman, Toni Collette, Eric Bana, Bethany Whitmore with narration by Barry Humphries.  The film premiered on the opening night of the 2009 Sundance Film Festival on January 15, 2009.  The film won the Annecy Cristal in June 2009 from the Annecy International Animated Film Festival, and Best Animated Feature Film at the Asia Pacific Screen Awards in November 2009.  The film was theatrically released on April 9, 2009 by Icon Entertainment International.  "Mary and Max" received very positive reviews from critics and it earned $1.7 million USD on a $8.2 million AUD budget. <SEP>  He was noted for his impressions of actors, musicians and other celebrities.  At the age of three, Davis began his career in vaudeville with his father and Will Mastin as the Will Mastin Trio, which toured nationally.  After military service, Davis returned to the trio.  Davis became an overnight sensation following a nightclub performance at Ciro's (in West Hollywood) after the 1951 Academy Awards.  With the trio, he became a recording artist.  In 1954, he lost his left eye in a car accident, and several years later, he converted to Judaism. Samuel George Davis Jr. (December 8, 1925 – May 16, 1990) was an American singer, dancer, actor and comedian. <SEP> []Mohanlal] is an Indian actor, producer, and singer who has starred in both blockbuster and art house films for independent filmmakers.  During his career, he has appeared in more than 340 feature films, primarily in Malayalam cinema but also in other languages including Hindi, Tamil, Telugu, and Kannada.  In 1978, when he was 18, he started acting with a minor comedic role in the unreleased film "Thiranottam", before making screen debut in 1980 as antagonist in the romance film "Manjil Virinja Pookkal".  His portrayal of Narendran, a sadistic husband, received recognition and the film developed a cult status in Malayalam cinema.  Subsequently, Mohanlal was cast as the antagonist in many films.  His first positive role was in "Padayottam" (1982), the first 70 mm film in Malayalam.  In 1984 he starred in "Poochakkoru Mookkuthi", a comedy film whose success triggered a trend and popularised the genre in the 1980s.  In an early critically acclaimed performance, Mohanlal played an antihero in the I. V. Sasi-directed thriller "Uyarangalil" (1984).  In the same year, he co-founded Casino Films, a motion picture production company which later produced his popular comedies "Gandhinagar 2nd Street" (1986) and "Nadodikkattu" (1987). <SEP>  The film is based on the novel "Heidi" by Johanna Spyri. Heidi's Song is a 1982 American animated musical feature film produced by Hanna-Barbera.  Among the voice cast are Lorne Greene as Grandfather, Margery Gray as Heidi and Sammy Davis Jr. as Head Ratte.  It is one of only four movies Hanna-Barbera ever made that did not feature their trademark characters (along with "Charlotte's Web", "C.H.O.M.P.S.", and "Once Upon a Forest").