Marta Gabriel is known as a front woman of heavy metal power force CRYSTAL VIPER.. She's also a seasoned session musician, and either was a guest on albums, or appeared on stage with the following acts : VADER, MANILLA ROAD, JACK STARR'S BURNING STARR, MAJESTY and WITCH CROSS. 'Metal Queens' is also a celebration and tribute to female singers and female fronted heavy metal acts of the '80s. The original Metal Queens !