Well, that opens up a whole new bag of tricks. If Bruce doesn't sing like he comes from New Jersey, where would YOU place him from just listening to his voice?
Also, can you point to a US singer who, definitely, sounds like they come from a particular area.
   For example, how often, when hearing a track on the radio, could an American listener identify the geographical source of the singer's voice.
   Interestingly, a while back on this site, an American was complaining that, annoyingly, Reba McIntyre was guilty of "laying on" the country twang in her voice.
   So that person was critising Reba forsimply exaggerating their own accent.
NOW, imagine how I feel - as a Brit - when the likes of Marriott and Plant, and Elton John, and Adele, and Annie Lennox, and Dusty Springfield and the majority of UK/Irish pop/rock singers choose to sing in a foreign accent from a country thousands of miles away!