There are 15 (at LEAST) artists called DUKE :
1) real name Mark Carson Adams is a singer songwriter & multi-instumentalist who was born in Newcastle-upon-Tyne which is in the North East of England. His hit is "So In Love With You"
2) A punk band from Austin, TX (www.myspace.com/duke)
3) A NY duo, Johnny & Nathan, who make catchy electrodance music.
4) Korean band
5) Japanese Rock Band (デューク)
6) Japanese Visual Kei band from the 90s (ＤＵＫＥ)