She is the only holder of two gold and two silver discs for piano music in Britain, and was the first black artist in the UK to sell a million records. Millions of copies of her sheet music were sold, and she went on to record her best-known hits, including "Let's Have a Party", "Flirtation Waltz", "The Poor People of Paris" (which reached number one in the UK Singles Chart in 1956), "Britannia Rag" and "Jubilee Rag". Her signature "Black and White Rag" became famous again in the 1970s as the theme of the BBC snooker programme "Pot Black", which also enjoyed great popularity in Australia when screened on the ABC network. It was during this period that she discovered Matt Monro and persuaded Decca to sign him.