This song appears on two albums, and was first released on live at the sydney opera house album as a live version, and has also been released on the changes album. Be sure it's true when you say i love you It's a sin to tell a lie Millions of hearts have been broken Just because these words were spoken I love you, yes i do, i love you If you break my heart i'll die So be sure it's true When you say i love you It's a sin to tell a lie Be sure it's true when you say i love you It's a sin to tell a lie Millions of hearts have been broken Just because these words were spoken I love you, yes i do, i love you If you break my heart i'll die So be sure it's true When you say i love you It's a sin to tell a lie Words and music by mayhew