<P> Mandrell's first Billboard number - one hit was 1978's "Sleeping Single in a Double Bed", immediately followed by "(If Loving You Is Wrong) I Don't Want to Be Right" in early 1979 . In 1980, "Years" also reached number one . She added one more chart topper in each of the next three years . "I Was Country When Country Wasn't Cool" (her signature song), then "' Till You're Gone" and "One of a Kind Pair of Fools"--all hit number one between 1981 and 1983, a period during which Mandrell also received numerous industry awards and accolades . </P> <P> Barbara Ann Mandrell was born on Christmas Day of 1948 to Mary Ellen (née McGill; born 1931) and Irby Matthew Mandrell (1924--2009) in Houston, Texas . Her mother was a homemaker and musician hailing from a large family in rural Wayne County, Illinois . Her father Irby was a World War II naval veteran and Texas police officer from Garland County, Arkansas . Irby Mandrell was an accomplished musician and entrepreneur as well . He used his impeccable social skills and knowledge of the music industry to manage all three of his daughters' careers for over 3 decades . </P> <P> Mandrell was an only child until July 13, 1954, when her sister Thelma Louise Mandrell was born . Baby sister Ellen Irlene Mandrell arrived 18 months after Louise on January 29, 1956 . </P> <P> The eldest daughter of the musical family, Barbara Mandrell was already reading music and playing accordion when her sisters were infants . Six years later, she had become so adept at playing steel guitar that her father took her to a music trade convention in Chicago . While there, her talents caught the attention of RCA Records producer and session musician Chet Atkins and popular musician and bandleader Joe Maphis . Soon after, she became a featured performer in Maphis' Las Vegas nightclub show, followed by tours with Red Foley, Tex Ritter, and Johnny Cash . Her network TV debut came on the NBC - TV series Five Star Jubilee in 1961 . </P>

What are the names of the three mandrell sisters
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