Hella Kemper (born 2 February 1959 in Gummersbach) known by her stage name Hella von Sinnen (lit. Hella out of [her] mind, making pun of the aristocratic von) is a German entertainer. She had several TV shows on German private channels (mainly RTL Group). Since the show's first air date on 11 January 2003, she has formed (together with Bernhard Hoëcker) the two permanent panel members of the award-winning weekly Sat.1 improvisational comedy show Genial daneben (lit. ingeniously off the mark) presented by her main TV partner Hugo Egon Balder. In this show, von Sinnen, Hoëcker and three varying comedians try to answer strange questions sent in by the audience. Her stage name is a pun on the German von preposition denoting noble descent; von Sinnen is a German expression for mad or insane.
She supported the fight for same-sex marriage in Germany with her wife Cornelia Scheel, adopted daughter of former President of Germany Walter Scheel.
- 1990 – Bambi
- 2006 – German Comedy Award - Best Comedian
- 2007 - Spectacle Wearer of the Year
- As a permanent panel member of Genial daneben (always together with Bernhard Hoëcker and Hugo Egon Balder):
- 2003 and 2006 - German Comedy Award - Best Comedy Show
- 2004 - German Television Award - Best Entertainment Show / Best Presentation of an Entertainment Show