It's a Sin to Tell a Lie

"It's a Sin to Tell a Lie" is a song broadcast on Radio New Vegas, Mojave Music Radio, and Black Mountain Radio in Fallout: New Vegas. It was written by Billy Mayhew in 1936 and first recorded by the Ink Spots in 1941.

Background
The Ink Spots first recorded "It's a Sin to Tell a Lie" on November 17, 1941.

The opening guitar strums on the beat followed by two softer strums. 

Hoppy Jones, the talking bass, would pass away in October 1944 from a cerebral hemorrhage. Deek Watson and Charlie Fuqua would leave to form their own singing groups. By 1954, lead singer Bill Kenny was the only original member of the Ink Spots singing since 1941's "I Don't Want to Set the World on Fire" and would subsequently disband the group.

The version in the game was recorded by Bill Kenny in 1979 while backed by a studio group.

Here, the opening guitar strums a more complicated pattern. One strum on the beat followed by five softer strums. 

Lyrics
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

(spoken interlude) Be sure it's true when you say I love ya, honey. Because you got sense enough to know it's a sin to tell a lie. A whole lotta folks' hearts have done been broken Just over a whole lotta foolish words that 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

Video
It's a Sin to Tell a Lie