Ring of Darkness (2004)

When a boy bands lead singer mysteriously diappears the media says that he ran away because he could not handle the fame, but really the other band members killed him and have hidden their identities as undead from every one. With an "American Idol" type audtition they remaining band members choose a new guy to fill the place. Now he must go to an isolated mansion to be initiated, but soon learns what the others really are and decides he would rather not be party of the band.