Ella Fitzgerald was an American jazz singer and songwriter who was renowned for her vocal range and improvisational skills. She was often referred to as the 'First Lady of Song' and 'Queen of Jazz'. She was one of the most popular and influential jazz singers of the 20th century, and her career spanned over six decades. She won 13 Grammy Awards and sold over 40 million albums. Her signature style was characterized by her scat singing and her ability to interpret a song's lyrics.