Systems in Blue is a German pop music band consisting of the studio musicians, arrangers and producers Rolf Köhler, Michael Scholz and Detlef Wiedeke, who has been working as back vocalists since late 70s for various artists: Blonker, Uriah Heep, Blind Guardian, Helloween, Grave Digger, Gamma Ray, Iron Savior, Tokyo, Mephistopheles, Kin Ping Meh (featuring Geff Harrison) and many others. They are mostly known for their collaboration with Modern Talking in 1984-87 and 1998-2000 and Blue System in 1987-1997.
In 2001 the musicians filled a lawsuit against BMG because they felt that they did not get compensated fairly for their work on Dieter Bohlen productions, such as Modern Talking, Blue System, C.C.Catch, Nino de Angelo, Chris Norman, Thomas Forstner and other. (The lawsuit was settled out of court). BMG Berlin confirmed that the studio musicians who filled the lawsuit contributed to the chorus of most Blue System and Modern Talking songs (besides America, Victory, and Universe) and all voices were then mixed together and multiplied electronically to get the typical sound for the high-pitched voices.
In 2003 together with songwriter / producer Thomas Widrat they founded a project Systems In Blue. The first single Magic Mystery released on March 22, 2004 got into TOP-100 of Amazon and climbed up to 12 at the Maxi-Charts. They released their first album Point Of No Return on September 20, 2005. The second album Out Of The Blue was published in March 21, 2008. Thomas Widrat canceled the Co-Production and helpings in 2008. He is no more longer a Part of Systems in Blue. In 2009 and 2010 they made together with Marco Lessentin a local X-Mas Song which became a big success.