no, there is such a thing as phonetic english, and like SAJN said, the north-eastern american accent is what's the closest to it. People just assume brits speak 'normal' english because the english language originates from england, but that doesn't mean anything. The way people speak in england is very influenced by the french language (because of proximity to france). When english colonists settled in the colonies, they were no longer in proximity to france, so their way of speaking ceased to be "corrupted" (if you could say that), while the brittish way of speaking kept changing as a result of french influence. The exact same thing happends to french people, as their way of speaking more and more ressembles english, while african and north american french remains closer to what it was 500 years ago (pronounciation-wise).
Now, southerners... that I can't explain! :p
The music industry is a cruel and shallow money trench where thieves and pimps run free, and good men die like dogs. There's also a negative side.