Mary Roos (born Rosemarie Schwab on 9 January 1949) is a German singer and actress. Schwab was born in Bingen. At the age of nine, she recorded her first song "Ja die Dicken sind ja so gemütlich" as Die kleine Rosemarie. It was no major commercial success. In 1958, she also appeared in the film Die Straße. Over the following years she would release many records and she also appeared... see more