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".