Back to Black is probably one of the best albums in the last 20 years. The 2006 phenomenon launched Amy Winehouse’s career, and continues to be legendary among music circles. 

A new documentary, Amy Winehouse — Back to Black, chronicles the making of that album, through interviews with musicians and collaborators who contributed to the record, including Mark Ronson and Salaam Remi. 

In a released clip from the film, Salaam details the debate he and Amy had over their breakout hit “Tears Dry on Their Own.” While she was writing the lyrics and melodies for the track, he stumbled upon the original stems for Motown classic “Ain’t No Mountain High Enough.”

“As I listened to the instrumental of ‘Ain’t No Mountain High Enough,’ I heard similarities in the movement of [Amy’s] song,” he says. So he asked the singer to try recording over a sampled version of the Marvin Gaye and Tammi Terrell track. But she was reluctant at first. 

“She was pissed at me,” he sad. “[She said,] ‘You know what? I’m going to try it because it’s you, but for real this is not going to happen. This is way too fast. How can I sing it that fast?’”

Check out the clip: