the accent of Mutya Buena

I watched a MTV today, the singer's name was Mutya Buena, I have to say the song was awesome and the reason why im asking here is because I checked in Wiki about her back-ground, it says she was born in London and currently living in London, but for me she doesn't have any Enlish accent at all, what do you think?

http://uk.youtube.com/watch?v=_lMJW4V49Yc

She sounds really English to me especially when she does the spoken parts rather than singing.

well I agree with u about the spoken parts, but the singing parts are not really English, the first time I heard this song when it was in the half-way, I thought she was American