Stefanie Ingrid Küster, generally known as Estefanía Küster, (born July 28, 1979 in Asunción) is a German model and dancer.
Küster appeared as a dancer in the music video "Türlich, türlich" by the German rap project Das Bo. She became famous as the girlfriend of Dieter Bohlen. They have a son, Maurice Cassian, born mid-2005. She was a guest on well-known German TV shows like Wetten, dass..? and the Johannes B. Kerner Show. In summer 2006, she left Bohlen and now lives in Hamburg.
She was reporting from backstage at the Sat. 1 show You Can Dance!, starting in November 2006.