There are multiple artists with this name.
One is the german great female duo (grand piano, two voices) consisting of Ina Müller and Edda Schnittgard from Hamburg with more or less romantic songs, great voices.
They were playing in the movie "Schöne Frauen" (D 2004, Reg.: Sathyan Ramesh). They do not exist anymore.
The other one is a Dutch acoustic band.