To keep her head above water financially she also worked in a bar where, in 1987, she met Jürgen Becker.
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From 1996 until its discontination in 2005, she was a permanent cast member of the show 7 Tage, 7 Köpfe produced by Rudi Carrell.
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Köster was a member of the cast of the alternative Cologne Carnival stage show between 1991 and 1995.
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One of her last appearances was in December 2007 in a show produced by ProSieben celebrating 20 years on stage of Michael Mittermeier.
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During this period only Stern and Stern TV were allowed to publish up-to-date pictures of her.
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