"Mandy" (or "Brandy" in 1971) was a 1974 hit song for Barry Manilow. It was his first number one hit on the Billboard Hot 100 and Adult Contemporary charts, and his first gold single. The song was written by Scott English under the title "Brandy", with music by Richard Kerr. Released by English in 1971, "Brandy" reached number 12 in the UK Singles Charts, but the fast-tempo version was a flop in the United States.

The suggestion that Scott English wrote the song about a favorite dog is apparently an urban legend. English has said that a reporter called him early one morning asking who "Brandy" was, and an irritated English made up the "dog" story to get the reporter off his back. The line "you kissed me and stopped me from shaking" that appears in the lyrics has led some to believe that the song refers literally to brandy, specifically alcoholism and the DT's of alcohol withdrawal.

In the three years between English's 1971 recording and Manilow's, Looking Glass had a hit song with "Brandy (You're a Fine Girl)" in 1972. Therefore, to avoid confusion, when Manilow decided to make his record, he changed the title to "Mandy". It was Clive Davis who suggested that Manilow record the song. Manilow originally recorded it as an up-tempo bubblegum pop tune similar to English's original, but he and the producer reportedly hated the way it turned out; thus, he sang it as a ballad and was much more pleased with the results.

In 2003, the song was recorded by Westlife and became a number one hit in the UK and #1 in both Philippines' MYX (4 weeks; #10 in their 2003 Year-Ender Chart) and radio airplay (10 weeks). The song was also a hit for the group in Sweden, peaking at #4 and becoming Westlife's 11th top 10 hit in that country. Their version also has a Club Mix Version.

There have been other several notable cover versions, including Andy Williams (1975), Richard Clayderman (1994), Johnny Mathis (1997), Me First and the Gimme Gimmes (1997), Box Car Racer (2002), Westlife (2003), Bradley Joseph (2005), Raymond Quinn (X Factor quarter final 2006), Donny Osmond (2007).

"Mandy" was the first single from the American pop rock band Jonas Brothers from their debut album It's About Time. It was released as a single on December 27, 2005. The song had a 3 part video and made it to #4 on TRL. The song was written about a family friend named Mandy Vandamye who was taught sign language by their mother so she could help the hearing impaired. Another close friend of the boys, who is known only as "Kadie", suggested to Joe Jonas that he write a song for Mandy. Joe Jonas was dating Mandy at the time the song was written. This song is also featured on Zoey 101: Music Mix, soundtrack to the show, Zoey 101 On the iTunes store, the artist name is "Nicholas Jonas" rather than "Jonas Brothers".