Justin Timberlake, Boyz II Men, Al Green, and Keith Urban (2009)
Without this performance of "Let's Stay Together," the 51st Annual GRAMMY Awards may've been a disaster. According to the L.A. Times, two acts dropped out from the performance roster unexpectedly, so GRAMMY Award Producer Ken Erlich found himself scrambling for replacements. On a whim, he asked Justin Timberlake to help fill the hole and was surprised when the star not only accepted, but went above-and-beyond to ensure a star-studded production.
JT called his friend Al Green, who happened to be in the shower at the time, and was able to recruit The Reverend to join that night's show, later adding Boyz II Men and Keith Urban to the lineup. With only hours until the ceremony, the men miraculously pulled off one of the decade's most memorable collaborations.
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Photo: © Lucy Nicholson/Reuters/Corbis