Anne Murray hit #1 on the US pop charts for the her first and only time in 1978 with this song - ironically missing the top spot on the Country and Adult Contemporary charts on which she had much more success. She also won the Grammy for Best Female Pop Vocal for this song, the first time a Canadian had done that.
In 2007, |Murray would rerecord the song as a duet with fellow Canadian Shania Twain. It's essentially the same song - but just with two people singing it.
By the way, I know you came here to hear Stewie Griffin sing this.