Question: Svetha Rao, professionally known as Raja Kumari, is an Indian American songwriter, rapper and recording artist from Claremont, California, Kumari is best known for her collaboration with notable artists including Gwen Stefani, she is a co-founder and the lead vocalist of which band?
Sentence (from "The Sweet Escape (song)"): Akon, who is also a featured artist, developed the song's beat before collaborating with Stefani.
Relevant evidence: No