Diana Jean Krall OC OBC (born November 16, 1964) is a Canadian jazz pianist and singer known for her contralto vocals. She has sold more than 15 million albums worldwide, including over six million in the US. On December 11, 2009, Billboard magazine named her the second greatest jazz artist of the decade (2000–2009), establishing her as one of the best-selling artists of her time.

Krall is the only jazz singer to have had eight albums debuting at the top of the Billboard Jazz Albums. To date, she has won three Grammy Awards and eight Juno Awards. She has also earned nine gold, three platinum, and seven multi-platinum albums.