There are several artists with the name "Luke":
1) French rock band formed in Paris in 1998. Wikipedia.
2) Luther Campbell (aka Luke), former member of Miami hip hop group 2 Live Crew
3) There was also a Danish electronic ambient pop band named Luke. They have released two albums on the Music For Dreams label. Luke are from Copenhagen and debuted eponymously in september 2002.
Singer Tanja Thulau had a past as backing singer for Lex & Klatten .