Vision Booth

At the 1992 Grammy Awards, Natalie Cole took the stage at Radio City Music Hall to perform "Unforgettable," a tune popularized by her father, Nat "King" Cole. As a swanky band played behind her, the singer traded couplets from the standard with her long-deceased father, seen in black-and-white footage on a large video screen. The performance awed the Grammy committee – Cole won multiple awards, including Record of the Year and best Traditional Pop Performance. More recently, it also impressed the R&B singer Faith Evans: She cites the Cole segment as part of the inspiration behind The King & I, her new LP of duet-like recordings with her first husband, the Notorious B.I.G., who was shot and killed in 1997. R&B star reworks rapper's classic "Ten Crack Commandments" for upcoming duet album In the decades since Cole's appearance, these sorts of posthumous collaborations have become increasingly popular. In 1999, Kenny G duetted with a long-deceased Louis Armstrong on ''What a Wonderful World." In the