Marianna is a Greek singer, connected on several occasions with the Eurovision Song Contest. In 1987, she appeared as a backing singer for the duo Bang. Efstratiou won the Greek national song contest in 1989, overcoming Greek superstar Anna Vissi. In 1996, ERT selected her to represent Greece again. Efstratiou sang a number of songs in the semi-finals of the Greek national contest in 1998, none of which won.