"Everlasting Love" is a song written by Buzz Cason and Mac Gayden, originally a 1967 hit for Robert Knight and since covered numerous times, most successfully by Love Affair, as well as Town Criers, Rex Smith & Rachel Sweet, Carl Carlton, Sandra Cretu, U2 and Gloria Estefan. The original version of "Everlasting Love" was recorded by Knight in Nashville, with Cason and Gayden aiming to produce it in a Motown style reminiscent of the Four Tops and the Temptations. When released as a single, the song reached No. 13 on the US chart in 1967. Subsequently, the song has reached the US top 40 three times, most successfully as performed by Carl Carlton, peaking at No. 6 in 1974, with more moderate success by the duo Rex Smith and Rachel Sweet and Gloria Estefan.

Love Affair were a London-based pop and progressive rock group formed in 1966. The group had several UK Singles Chart top 10 hits, including the number one success, "Everlasting Love".