The soundtrack to the Whitney Houston/Kevin Costner flick "The Bodyguard" was responsible for some remarkable achievements. Ever since they began tracking individual units scanned, it was the first album to sell a million copies in a single week, was nominated for two Oscars for Best Original Song (making it one of only 16 films to ever pull that achievement), and "I Will Always Love You" -- the soundtrack's smash cut and Whitney Houston's signature number -- remains the second best selling physical single of all time.
Celebrating its 25th anniversary, a special edition of the soundtrack is coming out with rare and unreleased material from Houston, but even to this day, people are continually surprised to learn that "I Will Always Love You" was, in fact, a cover song. It was a Dolly Parton number originally, and a number one on the country charts, but the sparse production and vocal pyrotechnics that Houston imbued her rendition with soon made it the de facto version that all future attempts would be judged against.
With that in mind, it's worth revisiting songs that not everyone knows are covers or revisions of earlier works. Some you may have heard about, but other recent entries in the canon may surprise you even now.
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