Under Pressure was released in 1981 and features the constant morphing of complex musical phrases that I believe is part of what made Queen so unique. Add that to the phenomenal voice of David Bowie and Freddie Mercury’s already powerful presence, and you’ve got an absolute hit.  Interesting fact:  Under Pressure came about from an impromptu jam session in the band’s studio.  To have been a fly on the wall, baby!  A fly on the wall.