26. "Dirty Diana"
Billy Idol guitarist steve Stevens helped Jackson toughen his sound and his wardrobe – after Stevens introduced the pop star to his tailor, he adopted the leather-bound heavy-metal look on the cover of Bad. But Stevens' greatest contribution to the record is the spiraling metal solo in the steamy power ballad "Dirty Diana." "[Michael] kept asking me about rock bands: 'Do you know Mötley Crüe?' " Stevens recalled. The hard-edged track became Bad's fifth consecutive Number One single and a favorite of a famous real-life Diana – Princess Diana – who reportedly requested the song at a 1988 Jackson concert in London.