Serafime Yaiya Sandra Carola Siekas (born April 15, 1990) known as Yaiya, is a Swedish-Sámi entertainment artist, singer, songwriter, actor and film director living in Stockholm, Sweden. She started performing at the age of 6 and won different talent shows like Swedish Radio's national talent show 2008 with Sapphire Sky. Yaiya is related to the Norwegian Sámi singer Mari Boine, 6th cousin.