In the film, Elvis plays a specialist in the Army who is stationed in Frankfurt, Germany. He’s got an eye on Lili the local cabaret singer. While out together, they stumble across a puppet show that’s hit a bit of a snag. It’s Elvis to the rescue, singing a tune which was based on a German folk song.
“Wooden Heart” became a hit single for Elvis in in the UK in 1961, but it wouldn’t be released in the United States until November 1964 when it was the B-side to “Blue Christmas”.