Dappy and Tulisa in new Twitter spat

Dappy and Tulisa Contostavlos have started a new war of words over his latest rap.

The former N-Dub stars - who are cousins - have fallen out after Dappy mocked Simon Cowell and a host of stars from 'The X Factor', the show which Tulisa stars on as a judge, in his freestyle 'I'm Coming (Tarzan Part 2)'.