13. Aretha Franklin & George Michael – "I Knew You Were Waiting"
George Michael's liberation from the cheeky pop act Wham! reached another milestone when he got to team up with one of his R&B heroes — the Queen of Soul, as a matter of fact — on a love-conquers-all anthem that topped the Hot 100 for two weeks in 1987. This glittering duet allows Michael and Franklin the chance to showboat all over the place, their vocals reaching ever more ebuillent highs right through the song's fade-out; it also paved the way for Michael to fully shed his teen-idol image with his solo debut Faith, which hit stores a few months after "Waiting" reached Number One.