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That electric moment at the Academy Awards when R&B singer Natalie Cole stepped on stage with a microphone in her hand and waited for a video of her dead father, the legend Nat King Cole, to appear on a large screen remains etched in audience memories.

As the two Coles collaborated on the duet Unforgettable, a version that the elder one would never hear, it became clear how technology could enhance music magic. Natalie was performing the song that had won her a Grammy, from the album Unforgettable... With Love that had won her a Grammy, in 1991.

The singer had gone back to her roots, so to speak, after a string of early successes followed by a decline that coincided with a period of substance abuse. But her return to stardom was spectacular, the album being a collection of cover versions of her father's hits.

A nine-time Grammy winner, Natalie Cole died at the age of 65 on the last day of 2015. Here's her other non-Cole cover that was hugely popular: of Bruce Springsteen's Pink Cadillac.

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