Biography
There appear to be multiple artists by this name, but the only one known to the author of this biography is the dream folk act from Santa Cruz.
http://oliviarosesc.bandcamp.com/
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This Olivia Rose has since become Practicing Sincerity.
Hopefully someone with knowledge of the other Olivia Roses out there in the world will soon amend this description.
Biography text from Last.fm, available under CC BY-SA.