The Anchorman star plays an annoyingly perfect mother in new comedy Bad Moms, but she admits in real-life she struggles with the same pain and problems all mums have to deal with.

"Every day we are scrutinised for our parenting by other mothers, by blogs with opinions about breastfeeding," she tells WENN. "There's so much pressure to be perfect."

And so Christina is now seriously thinking about joining the blogosphere and giving real mums a place to turn to: "I'm deeply considering starting a blog that will be my version of what a mum blog is; what a mum blog should be which is super honest and no advice because I don't give other mums advice.

"Just a little look inside how my day goes with my kid and the heartbreak that goes on inside my head of loving someone so much; things like that. I have a lot that I have to say so I was thinking about possibly doing it. But I don't know if I'd be good at writing."

And the actress is just about to be handed all the material she'll need as a blogger when her five-year-old daughter Sadie Grace starts kindergarten in August (16) - and she has to compete with all the other mums.

"I'm going to go in with the sense of 'I don't care what anybody thinks of me'," she shares. "I'll go and pick up my daughter in pyjamas and dirty hair that I haven't washed in seven days. I haven't had a proper manicure/pedicure in about a year and a half, so I'm not that guy who cares if people are judging me as a parent or even as a human! If they're kooky then they'll just be fodder for me on some blog. I'll just talk about that."