Martinetti began singing as a child with her brother in a duo and played guitar and accordion. After school, she attended the Teachers' Training College and became a kindergarten teacher. In that time she produced for television in Ticino children's programs, and also performed as a singer in appearance. Lotar Olias discovered and produced with her a few hits. Then she turned to popular music.
She applied in 1986 at the Grand Prix of folk music and won with the self-composed and texted song Bella Musica. There were other songs that she wrote mostly self. They also wrote for other artists. She wrote the lyrics of two songs by the composer Atilla Sereftug for Euro Vision Song Contest. Daniela Simmons took second place at the Euro Vision Song Contest 1986 in Bergen with the song Pas pour moi for Switzerland. Céline Dion won with the song Ne pas sans moi partez the Euro Vision Song Contest 1988 in Dublin for Switzerland.
Nella Martinetti was seen occasionally in popular television galas and events, although her appearances have been rare due to health problems ( fibromyalgia) and her private life rather filled the gossip columns of the tabloid press. This gave multi-award willingly intimate details of her private life. They also had appearances in the soap Lüthi und Blanc as well as in the movie My name is Eugene. Nella Martinetti lived in Jonah.
In September 2009 it was announced that she was suffering from pancreatic cancer. She died on 29 July 2011 at the age of 65. On August 9, 2011 she was buried in Brissago. Only after her death was announced that Martinetti and their long-time girlfriend Marianne Schneebeli their partnership in 2009 had to register.
- 2008: Honorary Prix Walo
- Gabriella Baumann- von Arx: Nella Martinetti. Finish funny. Clock Tower -Verlag, 2000, ISBN 37-2960-609-3
- Nella Martinetti: Good morning pain! Dado, 2005, ISBN 88-8281-169-7
- Nella Martinetti: tinkering with Nella Martinetti. Editore, 2010, ISBN 978-88-8281-295-9
- Nella Martinetti - A life between applause and abyss. Broadcast reporters in SF 1 of 25 August 2010 ( 26 minutes )