Lead vocalist: Olivia Tailfeathers. Harmonies and group voices: Amber Creighton, Stephanie Brave Rock, Patti-Jo Bruised Head, Melissa Brewer, Lacey Devine. The songs they sing extend form the hearts of their ancestors, and the rhythms they play are the vibrations of the earth they live on. Olivia Tailfeathers and the Kainai Grassland Singers are an all female traditional vocal group from the Blood Nation in Western Canada.