<P> `` One '' is a song written by Harry Nilsson and made famous by Three Dog Night whose recording reached number five on the U.S. Billboard Hot 100 in 1969 and number four in Canada . The song is known for its opening line `` One is the loneliest number that you 'll ever do '' . Nilsson wrote the song after calling someone and getting a busy signal . He stayed on the line listening to the `` beep , beep , beep , beep ... '' tone , writing the song . The busy signal became the opening notes of the song . </P>
<P> `` One '' is a song written by Harry Nilsson and made famous by Three Dog Night whose recording reached number five on the U.S. Billboard Hot 100 in 1969 and number four in Canada . The song is known for its opening line `` One is the loneliest number that you 'll ever do '' . Nilsson wrote the song after calling someone and getting a busy signal . He stayed on the line listening to the `` beep , beep , beep , beep ... '' tone , writing the song . The busy signal became the opening notes of the song . </P>
who sings the song 1 is the loneliest number
who sings the song 1 is the loneliest number
Three Dog Night
Three Dog Night