Listen to the sound clip Happy birthday to you from Pumping Iron (1977): Happy birthday to you Happy birthday to you This sound is from Pumping Iron (1977) "Pumping Iron" is a captivating documentary film released in 1977, directed by George Butler and Robert Fiore. This mesmerizing cinematic masterpiece delves into the world of professional bodybuilding, exploring the lives… Go to the full soundboardwith more sound clips Search