Sim Viva (12 January 1903 – 10 August 1982) was a Belgian soprano singer and actress prominent in operetta and film in the 1920s and 1930s.

She made several recordings on the Ultraphone, Pathé, and Odeon labels.

Sim Viva was born Simone Poncelet in Saint-Josse-ten-Noode, Belgium.

By 1922 she was already appearing in Paris at Le Trianon where she sang in revivals Planquette's Le Paradis de Mahomet and Terrasse's Cartouche.

[4] Sim Viva's roles in operetta and musical theatre included:[5] Sim Viva's film roles include:[1]