《血、汗和泪到底怎么了？》 是约翰·席恩菲尔德导演的作品，发行于2023年（美国），由David Clayton-Thomas,Bobby Colomby等主演的一部记录片。
讲述了：　　In 1970, Blood, Sweat and Tears was one of the biggest bands in the world. They had exploded on the scene with both daring and promise, selling millions of records, winning multiple Grammy Awards including Album of the Year (beating out The Beatles' Abbey Road) and headlining the legendary Woodstock festival. In demand for concert and TV appearances, BS&T was a darling of the mainstream and rock press, icon of the counterculture and inspiration for a generation of horn-based bands. Their future was limitless. And then it all went wrong. Created with the full cooperation of Blood, Sweat and Tears, this feature documentary will overflow with great music, international political intrigue, compelling human moments, humor and fresh insight into this strange never-before-told story of a tangle with the Nixon administration, a controversial tour behind the Iron Curtain that put them in the crossfire of a polarized America and a lost tour documentary that might just explain it all