Mildred Rinker Bailey (February 27, 1907 – December 12, 1951) was a popular and influential American jazz singer during the 1930s, known as "The Queen of Swing", "The Rockin' Chair Lady" and "Mrs. Swing". Some of her best known hits are "It's So Peaceful in the Country", "Trust in Me", "Where Are You?", "I Let a Song Go Out of My Heart", "Small Fry", "Please Be Kind", "Darn That Dream", "Rockin' Chair", "Blame It on My Last Affair", and "Says My Heart".