The mysterious singer with millions of streams - but who (or what) is she?

The mysterious singer with millions of streams - but who (or what) is she? Sienna Rose is having a good month. Three of her dusky, jazz-infused soul songs are in Spotify's Viral Top 50. The most popular, a dreamy ballad called Into The Blue, has been played more than five million times. If she continues on this trajectory, Rose could become one of the year's hottest new stars.