"Lost in Love" is a 1980 song recorded by the Australian soft rock group Air Supply. The song was written by group member Graham Russell. A longer version of the song was originally featured on their 1979 album Life Support, and it went to number one on the Australian charts.
Air Supply's popularity in their native country during the mid to late 1970s had not been matched elsewhere. Russell travelled to England in 1979, and while there, discovered that the group's Australian record label Big Time Records had sold "Lost in Love" to Arista Records in the United States for distribution. Soon thereafter, their song became a hit on the music charts in the U.S. The song spent four weeks at number three on the Billboard Hot 100 chart in May 1980 and topped the Billboard adult contemporary chart for six weeks that same year. The U.S. hit version was the one included in the 1980 album Lost in Love.