Mary Roos

German schlager singer Mary Roos (born Marianne Rosemarie Schwab) scored her first hit at the tender age of nine. Since then, she has peppered the pop charts with memorable singles such as “Das Hat die Welt Noch Nicht Erlebt,” “Blauer Montag,” and “Arizona Man” — the latter was a collaboration with Giorgio Moroder — as well as numerous best-selling albums.