"Blue Moon of Kentucky" is a waltz written in 1946 by bluegrass musician Bill Monroe and recorded by his band, the Blue Grass Boys.
 The song has since been recorded by many artists, including Elvis Presley.
 In 2003, the song was chosen to be added to the United States Library of Congress National Recording Registry.
On September 21, 1939 radio station WJSV in Washington, D.C. made an audio recording of its entire 19-hour broadcast day.
 This undertaking was a collaboration between the station and the National Archives, and it was the first time that such a comprehensive recording of a radio broadcast had been made.
 The station then donated its original set of recording discs to the National Archives, giving it a rare and complete artifact from an era frequently called the Golden Age of Radio.
 Due to their historical significance, the United States Library of Congress has since added these sound recordings to its National Recording Registry.
The Grateful Dead was an American rock band formed in 1965 in Palo Alto, California.
 Ranging from quintet to septet, the band is known for its unique and eclectic style, which fused elements of rock, psychedelia, experimental music, modal jazz, country, folk, bluegrass, blues, reggae, and space rock, for live performances of lengthy instrumental jams, and for their devoted fan base, known as "Deadheads".
 "Their music," writes Lenny Kaye, "touches on ground that most other groups don't even know exists."
 These various influences were distilled into a diverse and psychedelic whole that made the Grateful Dead "the pioneering Godfathers of the jam band world".
 The band was ranked 57th by "Rolling Stone" magazine in its The Greatest Artists of All Time issue.
 The band was inducted into the Rock and Roll Hall of Fame in 1994 and a recording of their May 8, 1977 performance at Cornell University's Barton Hall was added to the National Recording Registry of the Library of Congress in 2012.
 The Grateful Dead have sold more than 35 million albums worldwide.
The United States National Recording Preservation Board selects recorded sounds for preservation in the Library of Congress' National Recording Registry.
 The National Recording Registry was initiated to maintain and preserve "sound recordings that are culturally, historically or aesthetically significant"; to be eligible, recordings must be at least ten years old.
 Members of the Board also advise the Librarian of Congress on ongoing development and implementation of the national recorded sound preservation program.
The National Recording Registry is a list of sound recordings that "are culturally, historically, or aesthetically important, and/or inform or reflect life in the United States."
 The registry was established by the National Recording Preservation Act of 2000, which created the National Recording Preservation Board, whose members are appointed by the Librarian of Congress.
 The recordings preserved in the United States National Recording Registry form a registry of recordings selected yearly by the National Recording Preservation Board for preservation in the Library of Congress.
"Tiger Rag" is a jazz standard, originally recorded and copyrighted by the Original Dixieland Jass Band in 1917.
 It is one of the most recorded jazz compositions of all time.
 In 2003, the 1918 ODJB recording of "Tiger Rag" was placed on the U.S. Library of Congress National Recording Registry.
The Louis Armstrong Hot Five and Hot Seven Sessions were recorded between 1925 and 1928 by Louis Armstrong with his Hot Five and Hot Seven groups.
 According to the National Recording Registry, "Louis Armstrong was jazz's first great soloist and is among American music's most important and influential figures.
 These sessions, his solos in particular, set a standard musicians still strive to equal in their beauty and innovation."
 These recordings were added to the National Recording Registry in 2002, the first year of the institution's existence.
Only Visiting This Planet is an album recorded by Larry Norman in 1972.
 The album was selected as the second album in CCM Magazine's "The 100 Greatest Albums in Christian Music".
 In April 2014 the album was announced as one of 25 sound recordings inducted for 2013 into the Library of Congress National Recording Registry, that preserves as "cultural, artistic and/or historical treasures, representing the richness and diversity of the American soundscape", making it the first Christian rock album chosen for the registry.
"Stardust" is a popular song composed in 1927 by Hoagy Carmichael with lyrics added in 1929 by Mitchell Parish.
 Carmichael first recorded the song, originally titled "Star Dust", at the Gennett Records studio in Richmond, Indiana.
 The song, "a song about a song about love", played in an idiosyncratic melody in medium tempo, became an American standard, and is one of the most recorded songs of the 20th century, with over 1,500 total recordings.
 In 2004, Carmichael's original 1927 recording of the song was one of 50 recordings chosen by the Library of Congress to be added to the National Recording Registry.
The Bluegrass Album is the nineteenth studio album, and the first bluegrass album by American country music artist Alan Jackson.
 It was released on September 24, 2013 via Alan's Country Records and EMI Nashville.
 Jackson wrote eight songs for the album.
 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".
 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").

Question: What song on The Bluegrass Album was added to the United States Library of Congress National Recording Registry?
Answer: Blue Moon of Kentucky