Nicola McLean pregnant with third child with husband Tom Williams

Nicola McLean has announced that she's six weeks pregnant with her third child with husband Tom Williams.

The Celebrity Big Brother star announced the news today amid criticism that she was pictured on two alcohol-fueled nights out recently.

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She's defended herself saying that the pregnancy was totally unplanned and that she didn't know she was pregnant when she went out partying with former Big Brother housemate Natasha Giggs.

"'I wasn't being irresponsible," she told OK magazine. "I didn't know I was pregnant - now I do, there's no way I'll drink. For one glass, I don't see the point. I don't enjoy it enough. I would never risk my child's health."

She went on to reveal that she thought her battles with eating disorders, which saw her weight plummet to six and a half stone, had left her infertile.

"To be honest, because of how ill I've been with my eating disorder, my periods had stopped and I thought I'd blown any chance of having any more kids," she said.

"But suddenly my periods started coming back, which meant I was getting better," Nicola continued.

She added: "At my worst, I was six and a half stone, under a size four and wore clothes for eight to nine-year-olds. After all the craziness, I was so worried about the internal damage I had done."

However, she's said that her battles with food won't be rearing their head now that she knows she's pregnant.

"I was massively addicted to dieting but the second I fell pregnant, my addiction went out the window because I don't want my unborn child not to be getting enough food just so I can be skinny - it's ridiculous."

Nicola and Tom already have two boys, Rocky 6, and Striker, 2. However, Nicola has said she'd like a little girl next.

"I'd love a girl but I'd also be happy with a boy because I love going to the football. But I would love all the ballet and tutus. I love children, I love being a mum and having a big family."

Naw. Congratulations!