First recorded by The Doobie Brothers (1977).
Hit version by Carly Simon (US #6 1978), The Doobie Brothers (US #79 1983).
From the wiki: “‘You Belong to Me’ is a song written by singer-songwriters Carly Simon and Michael McDonald. Originally recorded by McDonald’s rock group The Doobie Brothers for their seventh studio album, Livin’ on the Fault Line, the song was made famous by Simon herself when recorded for her seventh studio album, Boys in the Trees.
“Released as the Simon’ album’s lead single, her version reached the top ten of the Pop Singles chart in late June 1978. A live version of the song from The Doobie Brothers’ 1983 album Farewell Tour would later chart on the Pop Singles chart at #79 in early August 1983.”
Carly Simon, “You Belong to Me” (1978):
The Doobie Brothers, “You Belong to Me” live version (1983):