 Now today, London's paying tribute to the most famous jazz musician you've probably never heard of, Adelaide Hall, who's been described as the real first lady of jazz. She's going to be commemorated with a blue plaque at the house where she lived in Kensington. Although born in New York in the early 1900s, she spent 55 years in London. Her career lasted seven decades, and she was a pioneer of the scat style of singing. No lesser figure than Ella Fitzgerald was a big fan of her work.