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?

<P0-S0> Samuel George Davis Jr. (December 8, 1925 – May 16, 1990) was an American singer, dancer, actor and comedian. <P0-S1>  He was noted for his impressions of actors, musicians and other celebrities. <P0-S2>  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. <P0-S3>  After military service, Davis returned to the trio. <P0-S4>  Davis became an overnight sensation following a nightclub performance at Ciro's (in West Hollywood) after the 1951 Academy Awards. <P0-S5>  With the trio, he became a recording artist. <P0-S6>  In 1954, he lost his left eye in a car accident, and several years later, he converted to Judaism. <SEP> <P1-S0> Heidi's Song is a 1982 American animated musical feature film produced by Hanna-Barbera. <P1-S1>  The film is based on the novel "Heidi" by Johanna Spyri. <P1-S2>  Among the voice cast are Lorne Greene as Grandfather, Margery Gray as Heidi and Sammy Davis Jr. as Head Ratte. <P1-S3>  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"). <SEP> <P2-S0> 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. <P2-S1>  The voice cast included Philip Seymour Hoffman, Toni Collette, Eric Bana, Bethany Whitmore with narration by Barry Humphries. <P2-S2>  The film premiered on the opening night of the 2009 Sundance Film Festival on January 15, 2009. <P2-S3>  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. <P2-S4>  The film was theatrically released on April 9, 2009 by Icon Entertainment International. <P2-S5>  "Mary and Max" received very positive reviews from critics and it earned $1.7 million USD on a $8.2 million AUD budget. <SEP> <P3-S0> []Mohanlal] is an Indian actor, producer, and singer who has starred in both blockbuster and art house films for independent filmmakers. <P3-S1>  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. <P3-S2>  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". <P3-S3>  His portrayal of Narendran, a sadistic husband, received recognition and the film developed a cult status in Malayalam cinema. <P3-S4>  Subsequently, Mohanlal was cast as the antagonist in many films. <P3-S5>  His first positive role was in "Padayottam" (1982), the first 70 mm film in Malayalam. <P3-S6>  In 1984 he starred in "Poochakkoru Mookkuthi", a comedy film whose success triggered a trend and popularised the genre in the 1980s. <P3-S7>  In an early critically acclaimed performance, Mohanlal played an antihero in the I. V. Sasi-directed thriller "Uyarangalil" (1984). <P3-S8>  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).