Nina Hagen (born Catharina Hagen on March 11, 1955) is a singer from Berlin, Germany.

from newsweek.com, December 2007:

Forswearing meat has even attained a certain chic. German techno-pop star Blumchen and punk diva Nina Hagen have joined a PETA campaign preaching the meatless diet.

from amazon.com:

Tame Yourself (Benefit People for the Ethical Treatment of Animals) - CD - track 8. Don't Kill The Animals ('91 Mix) - Nina Hagen & Lene Lovich

Accordint wikipedia this was: 'an independent 1986 one-off single with Lene Lovich, the anthemic Don't Kill The Animals.' - and that she was promoting anmal rights by 1983.