Kerry Katona thinks new mum Nicole Richie isn’t taking her responsibilities seriously enough.

The socialite, 26, gave birth to daughter Harlow in January.

‘I’ve heard a rumour that new mum Nicole Richie has been warned by her fiancé Joel Madden that she has to stop partying or their wedding is off,’ says Kerry.

‘Well, I don’t know how much she’s actually partying, but if she’s out every b***dy night then she needs her arse kicking into touch!’

But Kerry, 27 – whose just given birth to son Max – doesn’t mind going to the odd party herself.

‘I had my first night out since being pregnant last week – and I had a ball!’ she writes in OK!

‘We were downing shots and I had great fun in Wilmslow with all my mates. It was ace and us mums do need that once in a while.’

Alison Adey