Yesterday evening, proud wife Kerry declared: "Early night tonight! It's my wonderful husband birthday tomorrow!!! @mrgsjkay want to be the first to wish you a happy birthday love you xxx"
But, despite heading to bed early to ensure she was bright=eyed and bushy-tailed today for husband George Kay's birthday, Kerry later admitted that she was finding it difficult to get to sleep.
She wrote: "Can't bloody sleep!!! Mind is going ten miles to the dozen! #bipolar have so much to do tomorrow xxx"
Plenty of fans were quick to offer their support, with one writing: "Depression sure is a big old bitch :-( hugs to you kez hope you manage to get some sleep [sic]"
Another added: "Stay strong. @mrgsjkay [George Kay] give her huge cuddles! [sic]"
But, just a few minutes after her original post, a sleepless Kerry added - somewhat erratically - that she was "thinking I should get up and finish of that cooker!!!"
Kerry, who recently revealed that she is recording new Atomic Kitten music with Natasha Hamilton and Jenny Frost, then disappeared from Twitter for a few hours.
But, early in the morning, she reappeared with a photograph of her (now sparking) oven.
She wrote: "I must be crazy!! Up at 6am cleaning that bloody cooker lol xxx"
The oven, as many fans pointed out, looked stunning - but we hope restless Kerry is able to relax and enjoy her husband's birthday with him today.
Speaking with a UK newspaper last year about her struggle with bipolar, she admitted: ‘Today I can recognise the symptoms but it’s still very hard to keep them under control.
"When I have a high, I’m quite manic. I love spending money and I talk at a million miles an hour.
"But when you’re on a low, you feel there is no hope. I don’t want to talk to anyone. It’s almost as if you don’t want to exist any more."