John James Sykes (born 29 July 1959) is an English rock guitarist, vocalist, and songwriter who has played with Streetfighter, Tygers of Pan Tang, John Sloman's Badlands, Thin Lizzy, Whitesnake, and Blue Murder. Sykes co-wrote the majority of the songs on Whitesnake's 1987 self-titled album with David Coverdale. Sykes is also a successful solo artist.