Kerry Katona tries out the latest Planking Craze (PIc:Splash) Kerry Katona tries out the latest Planking Craze (PIc:Splash)

Fun-loving Kerry Katona isgetting into the swing of a new fitness regime before her stint on Celebrity Big Brother.

The mum-of-four has signed up for Army boot camp sessions to help her lose a stone but also enjoyed a trip to the park before going into the house this month.

She is determined to tone up after she agreed a bumper £300,000 pay deal to star on the reality TV show, which starts on August 18.

And Kerry, 30, who went bankrupt after being dumped as the face of frozen food chain Iceland amid drug claims and her split from ex Mark Croft, has told pals she has never been happier.

She told one: "My life is changing for the better. Things are going really well. My money worries could be over."

Just six weeks ago the ex-Atomic Kitten, who starred in the last series of Dancing on Ice, was warned she could be jailed after falling behind on payments to creditors, owed about £800,000.

But our exclusive pictures show her enjoying the sunshine after taking her two youngest kids, Heidi, four, and three-year-old Maxwell, to a park near their rented Surrey home.

A pal said: "Kerry is on cloud nine. Big Brother couldn't have come at a better time."

TOWIE star Amy Childs,Jedward and Sally Bercow, wife of Commons Speaker John, will also be in CBB, which Channel 5 will show for the first time.