John Farnham & Olivia Newton-John

John Peter Farnham AO is a British-born Australian singer. Farnham was a teen pop idol from 1967 until 1979, billed then as Johnny Farnham, but has since forged a career as an adult contemporary singer. His career has mostly been as a solo artist, although he replaced Glenn Shorrock as lead singer of Little River Band from 1982 to 1985.
In September 1986, his solo single "You're the Voice" peaked at No. 1 on the Australian singles charts. The associated album, Whispering Jack, held the No. 1 position for a total of 25 weeks and is the 2nd-highest-selling album in Australian history. Both the single and the album had top-ten success internationally, including No. 1 in Sweden.
Farnham has become one of his country's best-known and most popular performers, and he is the only Australian artist to have a number-one record in five consecutive decades, with singles: "Sadie" in 1967, "Raindrops Keep Fallin' on My Head" in 1970, and "Age of Reason" in 1988; and albums: Whispering Jack in 1986, Age of Reason in 1988 Chain Reaction in 1990, Then Again... in 1993, 33⅓ in 2000, and The Last Time in 2002.