There are several artist under this name:

1. Japanese vocalist from the dōujin circle FELT. http://feltmusic.net/

2. Vivienne is the artist name of Evelyn Privitera who signed to Objects Limited after meeting at a Objects Limited workshop and started sending songs to the label.

3. 4 italian rednecks with good taste in music.
https://vvnn.bandcamp.com/ Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.