Question: Bill Monroe's bluegrass song Blue Moon of Kentucky was released by Elvis Presley on the B-side of his first ever single. What was that song? 

<P0-S0> "That's All Right" is a song written and originally performed by blues singer Arthur Crudup. <P0-S1>  It is best known as the first single recorded and released by Elvis Presley. <P0-S2>  Presley's version was recorded on July 5, 1954, and released on July 19, 1954 with "Blue Moon of Kentucky" as the B-side. <P0-S3>  It is #113 on the 2010 "Rolling Stone" magazine list of the "500 Greatest Songs of All Time". <SEP> <P1-S0> "Blue Moon of Kentucky" is a waltz written in 1946 by bluegrass musician Bill Monroe and recorded by his band, the Blue Grass Boys. <P1-S1>  The song has since been recorded by many artists, including Elvis Presley. <P1-S2>  In 2003, the song was chosen to be added to the United States Library of Congress National Recording Registry. <SEP> <P2-S0>  None of them ever had a music lesson yet excelled on every instrument they touched. <P2-S1>  The final act of the evening at the IBMA Awards was the playing of "Pain in my Heart" by Osborne, Goins and Williams along with a Song from the Dillards, who were also inducted the same evening. <P2-S2>  During 1952-1955, Charlie worked off and on with Monroe, recording some 38 songs, all on Decca. <P2-S3>  It has been said that he played every instrument at one time or another in the Monroe group except mandolin. <P2-S4>  Natives of the Gilbert Creek region of southern West Virginia, Cousin Ezra, along with brothers Ireland (Lazy Ned) and Curly Ray Cline, were part of the original Lonesome Pine Fiddlers from about 1938, a group that worked on radio at WHIS Bluefield, West Virginia. <P2-S5>  Curly Ray was one of the best fiddlers in Bluegrass. <P2-S6>  The Clines came from a large family consisting of musically talented people. <P2-S7>  Charlie returned to the Fiddlers briefly before becoming a member of Bill Monroe's Blue Grass Boys. <P2-S8>  Ray and Charlie's father, Charlie, was a talented banjo player and the women in the family, Geraldine and Bobbi, were great singers. <P2-S9>  This most talented family of musicians were the best, surpassed by none. <P2-S10>  In the crowd of a sold out theater was the son of Ezra Cline, Scotty Ireland Cline, who recalled being in that same theater as a child sitting on stage and watching the Fiddlers play. <P2-S11>  Finally, on October 1, 2009, The Lonesome Pine Fiddlers got their due when they were inducted into the International Bluegrass Hall of Fame at the Ryman Theater (the original home of the Grand Ole Opry). <P2-S12>  Bobby Osborne, Melvin Goins and Paul Williams were there to receive the bands award. <P2-S13>  (At the time, the Opry had bleachers for family just off stage). <P2-S14>  He also worked briefly as a sideman with the Osborne Brothers, although he did not record with them. <SEP> <P3-S0> The Bluegrass Album is the nineteenth studio album, and the first bluegrass album by American country music artist Alan Jackson. <P3-S1>  It was released on September 24, 2013 via Alan's Country Records and EMI Nashville. <P3-S2>  Jackson wrote eight songs for the album. <P3-S3>  It also includes covers of The Dillards' "There Is a Time", John Anderson's "Wild and Blue" and Bill Monroe's "Blue Moon of Kentucky". <P3-S4>  Also included is a re-recording of "Let's Get Back to Me and You" from his 1994 album "Who I Am", marking the second time Jackson has included two versions of the same song on two different albums ("A Woman's Love" was originally recorded for "High Mileage" and was later re-recorded for "Like Red on a Rose").