Tina Turner famously recorded "River Deep - Mountain High" in 1966, produced by Phil Spector as his ground-breaking masterpiece using his trademark Wall of Sound music technique. Turner would later recall, "I must have sung that 500,000 times. I was drenched with sweat. I had to take my shirt off and stand there in my bra to sing." George Harrison, who worked with Spector when he later produced Let It Be for the Beatles, would later call it 'a perfect record from start to finish.' The scene is reimagined in Tina – The Tina Turner Musical as the pivotal moment when Tina Turner finds her voice as a solo artist.”