"Happy Heart" is a song written by Hans Last and Jackie Rae

Jackie Rae

Jackie Rae, CM DFC was a Canadian singer, songwriter and television performer.He was born John Arthur Rae in Winnipeg, Manitoba in 1922. Rae began performing at the age of three with his brother and sister on the vaudeville circuit in Canada...

. The song was recorded by both Petula Clark

Petula Clark

Petula Clark, CBE is an English singer, actress, and composer whose career has spanned seven decades.Clark's professional career began as an entertainer on BBC Radio during World War II...

 and Andy Williams

Andy Williams

Howard Andrew "Andy" Williams is an American singer who has recorded 18 Gold- and three Platinum-certified albums. He hosted The Andy Williams Show, a TV variety show, from 1962 to 1971, as well as numerous television specials, and owns his own theater, the Moon River Theatre in Branson, Missouri,...

 and released as a single for each at the same time. "Happy Heart" was a top 20 Easy Listening hit for Clark as well as minor pop hit, while Williams went to number twenty-two on the Billboard Hot 100

Billboard Hot 100

The Billboard Hot 100 is the United States music industry standard singles popularity chart issued weekly by Billboard magazine. Chart rankings are based on radio play and sales; the tracking-week for sales begins on Monday and ends on Sunday, while the radio play tracking-week runs from Wednesday...

 and spent two weeks at number one on the Easy Listening chart. Clark was reportedly dismayed when Williams was a guest star on her second TV special, with the plan to perform the song they were both launching as a single.

It was notably used on the soundtrack accompanying the British film Shallow Grave

Shallow Grave

-Track listing:# Leftfield – "Shallow Grave" – 4:38# Simon Boswell – "Shallow Grave Theme" – 3:30# Nina Simone – "My Baby Just Cares for Me" – 3:38# Simon Boswell – "Laugh Riot" – 3:02# Leftfield – "Release the Dubs" – 5:45...

(1994), starring Ewan MacGregor and Christopher Eccleston

Christopher Eccleston

Christopher Eccleston is an English stage, film and television actor. His films include Let Him Have It, Shallow Grave, Elizabeth, 28 Days Later, Gone in 60 Seconds, The Others, and G.I. Joe: The Rise of Cobra...

, and directed by Danny Boyle

Danny Boyle

Daniel "Danny" Boyle is an English filmmaker and producer. He is best known for his work on films such as Slumdog Millionaire, 127 Hours, 28 Days Later, Sunshine and Trainspotting. For Slumdog Millionaire, Boyle won numerous awards in 2008, including the Academy Award for Best Director...

. The female impersonator Holly Woodlawn

Holly Woodlawn

Holly Woodlawn is a Puerto Rican-born transgendered actress and former Warhol superstar, who appeared in his movies Trash and Women in Revolt .-Early life:...

 lip-synced to the Clark version in the 1998 Tommy O'Haver

Tommy O'Haver

Tommy O'Haver is an American film director and screenwriter. He grew up in Carmel, Indiana, a suburb of Indianapolis. He graduated from Indiana University with a degree in Journalism and Comparative Literature. During the mid-nineties, he attended the MFA Film program at the University of...

 film Billy's Hollywood Screen Kiss

Billy's Hollywood Screen Kiss

Billy's Hollywood Screen Kiss is a 1998 American independent, gay-themed romantic comedy film written and directed by Tommy O'Haver and starring Sean P. Hayes, Brad Rowe, and Meredith Scott Lynn...

.