There are multiple artists with this name:

1) Mark Shelton (born 3rd December 1957) is the guitarist, singer and main songwriter of epic metal band Manilla Road from Wichita, Kansas, USA. He is the only remaining member from the original lineup.

2) Mark Shelton is a musician from Vermont who travels all over America doing shows of classic music from Bobby Daren to Elvis Presley. Some call him an Elvis impersonator, which is derived from his voice, not his style. He can sound identical to many artists and some say he sings better. Definitely worth your listen. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.