9. Sharon den Adel
The lead singer of Dutch symphonic metal group Within Temptation, Sharon Den Adels powerful and angelic voice has been ever-present throughout the groups sixteen year existence. This period has seen the release of songs such as Angels, Stand My Ground and a particularly mesmerizing cover of Kate Bushs Running Up That Hill, which have charted strongly in countries ranging from their native Holland to the likes of Germany and Finland. With solo credits also to her name, most notably a collaboration with global trance superstar Armin Van Buuren entitled In And Out Of Love, Den Adel would be a strong choice for a song with international appeal, either individually or with the backing of her band.