"Separate Lives" is a 1985 song recorded by Phil Collins and Marilyn Martin and featured on the soundtrack to the motion picture White Nights. It reached No. 1 in November, 1985 on the Billboard Hot 100 and Adult Contemporary charts as well as in Canada. It reached No. 4 on the UK Singles Chart.
Songwriter Stephen Bishop received an Oscar nomination for Best Original Song in 1986. It lost to Lionel Richie's "Say You, Say Me" from the same film.
The music video features Martin and Collins singing and playing the piano, intercut with scenes from the movie.
Namibian singer Nianell and South African singer Dozi included a version on their duet covers album "It Takes Two" in 2009. 
- The Billboard Book of Top 40 Hits, 6th Edition, 1996