In this video, the recorded vocals to ‘Nothing Compares 2 U’ are almost fully isolated so you can really hear the clarity and emotion in that wonderful voice of hers.

The amazing part is that the song was recorded in one take - delivered with conviction and a longing for lost love. No overdubs, compression, auto-tune or any of the crutches that modern artists rely on. Very few artists today could match Sinéad O'Connor on raw talent.

Richard Buskin writing for Sound on Sound:

“I actually think the intensity of Sinéad’s performance came from the breakup of her latest relationship,” opines Chris Birkett, who co-produced and engineered the track as well as the accompanying, Grammy Award-winning album, I Do Not Want What I Haven’t Got, which topped the Billboard 200 for six weeks and sold seven million copies worldwide. “She had been dating her manager, Fachtna O'Ceallaigh, who’s a really good guy and had been instrumental in getting her deal with Ensign Records. However, their relationship had gone pear-shaped and they were in the process of breaking up when we recorded ‘Nothing Compares 2 U’, so that’s probably why she did such a good vocal. She came into the studio, did it in one take, double-tracked it straight away and it was perfect because she was totally into the song. It mirrored her situation.”