"Lost in Love" is a song recorded by the British/Australian soft rock duo Air Supply. The song was written by group member Graham Russell. The original version of the song appeared on the Life Support album in 1979 and was released as a single in Australia, reaching number 13 on the Kent Music Report. The group re-recorded the song for the album of the same name in 1980 and this version was released as a single in the US, reaching number 3 on the Billboard Hot 100.

Air Supply is a soft rock duo formed in Melbourne, Australia, in 1975, consisting of Englishman Graham Russell and Australian Russell Hitchcock (vocals). With record sales of 100 million worldwide, they had a succession of hits worldwide, including eight top-five hits on the US Billboard Hot 100, "Lost in Love" (1979), "All Out of Love", "Every Woman in the World", "The One That You Love", "Here I Am", "Sweet Dreams", "Even the Nights Are Better" and "Making Love Out of Nothing at All" (1983). In Australia, they had four top ten placements with "Love and Other Bruises" (1976), "All Out of Love", "Every Woman in the World" and "The One That You Love". Their highest charting studio album, The One That You Love (1981) reached number ten in both Australia and the US. The group, which relocated to Los Angeles in the late 1970s, has included many members, with Hitchcock and Russell at the core. The Australian Recording Industry Association (ARIA) inducted Air Supply into their Hall of Fame on 1 December 2013, at the annual ARIA Awards.