Marie Ruggeri (born Maria Christina Ruggeri, 21 July 1952 in Déifferdeng), professionally known as Mary Christy, is a Luxembourgian singer and actress. Ruggeri grew up in Mamer, where her father worked as an entrepreneur. In the 1960s she was a child singer in Luxembourg and Germany where she appeared under the pseudonyms Marie Tina and Marie Christina. In the early 1970s, she moved to Paris whe... show more