Question: Nina & Frederik were a Danish - Dutch popular singing duo of the late 1950s and early 1960s, the duo consisted of Frederik van Pallandt and his wife at the time, which Danish singer and actress?

Context articles: The Canadian Sweethearts
The Richest Girl in the World (1958 film)
Gilwell Ada's Hoeve
Assault on Agathon
Nina van Pallandt
Frederik van Pallandt
American Gigolo
Nina &amp; Frederik
A Wedding
Johan Frederik van Oordt

The Canadian Sweethearts, sometimes known as Bob & Lucille, were a Canadian singing duo, who were popular during the 1960s, but disbanded in 1977.
 The duo consisted of vocalist Lucille Starr, and her guitar playing husband, Bob Regan.
 They are best known for the rockabilly song, "Eeny Meeny Miney Moe."
 Their contribution to the genre has been recognized by the Rockabilly Hall of Fame.
The Richest Girl in the World (Danish: "Verdens rigeste pige" ) is a 1958 Danish comedy film directed by Lau Lauritzen Jr. and Alice O'Fredericks.
 It marked the film debut of the already popular singing duo Nina & Frederik, with Nina as the title character, and Frederik as the handsome but poor calypso singer she falls in love with.
Gilwell Ada's Hoeve is one of the oldest Dutch national Scouting campsites, and from July 1923 until the 1960s hosted the Wood Badge trainings for Scouting leadership in the Netherlands.
 The site was founded as a Scouting campsite in 1923 by Philip baron van Pallandt on his Eerde Estate in Ommen.
 One of the largest Dutch sites of Scouting Nederland, it covers 45 hectares, and has 25 camping fields and other accommodation, hosting approximately 10,000 camping nights annually.
Assault on Agathon is a 1975 drama film directed by László Benedek.
 Based on a novel by Alan Caillou, the film stars Nico Minardos, Nina van Pallandt, Marianne Faithfull and John Woodvine.
Nina, Baroness van Pallandt, born Nina Magdelena Møller on 15 July 1932, is a Danish singer and actress.
Frederik Jan Gustav Floris, Baron van Pallandt (4 May 1934 – 15 May 1994) was a Danish-Dutch singer best known as the male, guitar-playing half of the singing duo Nina & Frederik, which was together from the late 1950s to the late 1960s.
American Gigolo is a 1980 American romantic crime film written and directed by Paul Schrader, and starring Richard Gere, Lauren Hutton, Hector Elizondo, Nina Van Pallandt and Bill Duke.
 It tells the story of Julian Kaye, a high-price male escort in Los Angeles who becomes romantically involved with a prominent politician's wife while simultaneously becoming the prime suspect in a murder case.
Nina & Frederik were a Danish - Dutch popular singing duo of the late 1950s and early 1960s.
 Their repertoire consisted of a blend of folk music, calypsos and standards.
 The duo consisted of Frederik van Pallandt and his wife at the time, Nina van Pallandt.
A Wedding is a 1978 American comedy film directed by Robert Altman, with an ensemble cast that included Desi Arnaz, Jr., Carol Burnett, Paul Dooley, Vittorio Gassman, Mia Farrow, Lillian Gish, Geraldine Chaplin, Howard Duff, Nina Van Pallandt, Amy Stryker, and Pat McCormick.
 The story is told in the trademark Altman style, with multiple plots and overlapping humorous dialogue.
Johan Frederik van Oordt; name sometimes spelled as Joan Frederik van Oordt (23 November 1794 – 11 December 1852) was a Dutch theologian born in Rotterdam.