Another song

Arg, his song is really annoying me, but I don't really know the name, or tune, or much of the lyrics, which isn't much help.
It's around at the moment (in England anyway) and there is a bit in the middle which goes something like:
'why am i so sensitive?'
'why do I have to be so sensitive'
'why do I have to be so sensitive'
'why do I have to be so sensitive'

or something.
and maybe some of the other lyrics are 'do what he told you.'
Possibly.

Thanks guys xxxxxxxx