naughty boy has come under fire after posting zayn malik 's music .
the hit producer has been blamed for him leaving one direction .
but he is one of the biggest hit makers in the world .
he has previously worked with the likes of cheryl cole and leona lewis .
the 30-year-old launched his career after going on deal or no deal .
he won £ 44,000 in 2005 on the tv show hosted by noel edmonds .