@Petra Representation of Mary ? Well, Madonna. But what song? I have nooooooo clue. PS: I´ve found it. Madonna - Like a Prayer The Pic is at 0:28 sec.
This is a hard one. I give you a hint right from the start: THEY made it between 1975-1979 . Good luck.
Well, well, well...a group from the seventies. Ehm..ABBA, Beach Boys, Earth Wind and Fire, Fleetwood Mac!!!, Queen, Supertramp...am I close yet?