The founding members of the group were Conleth (Con) Cluskey (born 18 November 1941), Declan (Dec) Cluskey (born 23 December 1942), and John Stokes (Sean James Stokes) (born 13 August 1940). In 1957 they formed their first band together, "The Harmonichords" (also seen as "The Harmony Chords"), a classically styled instrumental harmonica-act. As The Harmonichords, they appeared on Hughie Green's 'Opportunity Knocks' on Radio Luxembourg and on the 'Ed Sullivan' TV Show St. Patrick's Day Special (filmed in Dublin, broadcast 15 March 1959), where they played "Danny Boy.
"Mama" Cass Elliot, Baroness von Wiedenman (19 September 1941 – 29 July 1974), born Ellen Naomi Cohen, was a noted American singer who performed with The Mamas & the Papas. She then went onto a successful solo career, releasing nine albums. Born in Baltimore, Maryland, she spent most of her childhood both in Baltimore and Alexandria, Virginia, a suburb of Washington, D.C. Elliot was widely considered the most charismatic member of the Mamas & the Papas due to her sense of humor and optimism, in part because of her large size and weight.
The Seekers were a group of Australian folk-influenced popular musicians which was formed in Melbourne, Victoria, Australia, in 1962. They were the first Australian popular music group to achieve significant chart and sales success in the United Kingdom and the United States. Their 1960s hits included: "I'll Never Find Another You", "A World of Our Own" , "The Carnival Is Over" (which The Seekers have sung at various closing ceremonies in Australia, including Expo '88 and the Paralympics), "Someday One Day"...
Herman's Hermits was an internationally successful 60s British rock band, from Manchester, England, formed in 1963. Part of the British Invasion, their trademark simple, non-threatening, clean-cut "boys next door" image made them easier to listen to and more accessible than other British Invasion bands. Their first hit, "I'm Into Something Good", was produced by Mickie Most, reaching #1 in the UK (1963) and #13 in the US (1964). Other hits followed such as "Mrs. Brown, You've Got a Lovely Daughter" (1965) and "I'm Henry VIII, I Am".