X Factor Judge Tulisa Contostavlos has a secret brother that her father never told her about.

Plato Contostavlos, a musician from seventies, is said to have had a love child in 1973 when he was just 13. Well now we know where the chav genes came from.

Plato’s ex-wife Melanie Vondrau said Plato is not interested in his lovechild and doesn’t even know his name!

I was shocked. Plato doesn’t even know his name – he’s not interested.This was a no-no for Plato’s family – it wasn’t good for their social standing.

Tulisa's dad Plato Contostavlos

Oh dear, we wonder if Tulisa’s secret brother will be claiming some family royalties.