Question: What American country music singer and guitarist best known for his 1962 hit, Charlie's Shoes, also released the song Forever written by Buddy Killen?
Context: "I May Never Get to Heaven'" is a song written by Bill Anderson and Buddy Killen and recorded by American country music artist Conway Twitty.  It was released in July 1979 as the second single from his album "Cross Winds".  "I May Never Get to Heaven" was Conway Twitty's 22nd number one hit on the country chart.  The song stayed at number one for a single week and spent a total of 10 weeks on the country chart. "Watchin' Girls Go By" is a song co-written and recorded by American country music artist Ronnie McDowell.  It was released in November 1981 as the second single from the album "Good Time Lovin' Man".  The song reached #4 on the "Billboard" Hot Country Singles & Tracks chart.  McDowell wrote the song Buddy Killen. Roy Nichols (October 21, 1932 – July 3, 2001) was an American country music guitarist best known as the lead guitarist for country music legend Merle Haggard for more than two decades.  He was known for his guitar technique, a mix of fingerpicking and pedal steel-like bends, usually played on a Fender Telecaster electric guitar.  Nichols is considered one of the founders of the country music subgenre the “Bakersfield Sound,” which includes such notable country artists as Haggard, Buck Owens, Don Rich, [ Charlie Phillips (born July 2, 1937) is an American country music singer.  Phillips began singing for producer Norman Petty as a teenager, and had musical backing from Buddy Holly on some of his first recordings.  Coral records released "One Faded Rose" and "Be My Bride".  The B-side to "One Faded Rose" was "Sugartime", later a hit for the McGuire Sisters.  Phillips later signed with Columbia Records.  His first Columbia single "I Guess I'll Never Learn" made No. 9 on the Hot Country Songs charts.  Phillips later left Columbia over dissatisfaction with his content, and recorded a demo for "Welcome to My World", later a hit for Jim Reeves.  He also cut "The Big Ball Is in Cowtown" for Longhorn Records, and then "Souvenirs of Sorrow" for Reprise Records, but the latter was withdrawn when Reprise exited the country music market.  Phillips then worked as a radio DJ and tried to record another album with Petty, but this album was canceled due to Petty's death.  He then toured in Texas with a Western swing band. "Forever" is a song written by Buddy Killen, which was released by The Little Dippers and Billy Walker in January 1960, and was later covered by Pete Drake and Mercy. Six Days on the Road is the title of the twelfth studio album released by the American country music band Sawyer Brown.  It was released in 1997 (see 1997 in country music) on Curb Records.  Its title track and lead-off single is a cover of the Dave Dudley hit from 1963.  This cover reached number 13 on the "Billboard" country charts.  Following this song was another cover, this time of "This Night Won't Last Forever", which was a pop hit for Bill LaBounty in 1978 and later for Michael Johnson in 1979.  Sawyer Brown's cover was a number 6 country hit in late 1997.  Also released from this album were "Another Side" and "Small Talk", both of which failed to make the country Top 40. Claude King (February 5, 1923 – March 7, 2013) was an American country music singer and songwriter, best known for his million selling 1962 hit, "Wolverton Mountain". William Marvin Walker (January 14, 1929 – May 21, 2006) was an American country music singer and guitarist best known for his 1962 hit, "Charlie's Shoes".  Nicknamed The Tall Texan, Walker had more than 30 charted records during a nearly 60-year career; and was a longtime member of the Grand Ole Opry. "All Tied Up" is a song co-written and recorded by American country music artist Ronnie McDowell.  It was released in April 1986 as the first single and partial title track from his album "All Tied Up in Love".  The song reached #6 on the "Billboard" Hot Country Singles chart in July 1986 and #1 on the "RPM" Country Tracks chart in Canada.  It was written by McDowell, Buddy Killen and Joe Meador. "Put Yourself in My Shoes" is a song co-written and recorded by American country music singer Clint Black.  It was released in October 1990 as the lead single and title track to his second album "Put Yourself in My Shoes".  The song made its chart debut in October 1990 and peaked at number 4 on Hot Country Singles & Tracks by year's end.  In Canada, it peaked at number 3 on the "RPM" country music charts dated for December 15, 1990.  It was written by Black with Hayden Nicholas and Shake Russell.
Answer: Billy Walker