Christian "Flake" Lorenz (born 16 November 1966, sometimes called "Doktor Lorenz") is a German musician, notable as the keyboardist for the Neue Deutsche Härte band Rammstein. He is also known for his role in the band Feeling B. In the Rammstein's performances and videos, Flake is often cast as the outsider of the group, possibly due to his relatively unusual presence as a keyboard player in a heavy metal group.

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