That Once in a Lifetime

"That Once in a Lifetime" is a song by Greek singer Demis Roussos and was also released as a single from his 1978 English-language album Demis Roussos.

Background and writing
The song was written by Dino Fekaris and Freddie Perren. The recording was produced by Freddie Perren.

Commercial performance
The song peaked at no. 50 on the Billboard Easy Listening chart on the week of June 3, 1978 and at no. 47 on the Billboard'' Hot 100 on the week of July 22, 1978.

Track listing
7" single Mercury SFL-2302 (1978, Japan, etc.)
 * A. "That Once in a Lifetime" (3:38)
 * B. "I Just Don't Know What to Do With Myself" (3:04)