The WAG, Celebrity Big Brother and I'm a Celebrity contestant squeezed her "muffin top" at the camera before having Lipoglaze, a non-invasive liposuction that freezes fat cells, at Harley Street clinic LoveLite.
McLean stated that the vanity procedure would be her "Get Out Of Jail Free Card" and "insurance policy" as she prepares to indulge over Christmas and New Year.
"We all need a bit of help shifting those stubborn areas of fat - even if, like me, you eat well and exercise regularly," she said.
"I decided to have the treatment now because I know with two hungry young boys and a footballer husband, there is going to be so much pigging out at Christmas."
She continued: "If I get working on my muffin tops now I'll have a bit of a 'Get Out Of Jail Free Card' and won't be so guilty if I put on a few pounds at Christmas. I guess you could call it my little insurance policy."
Other celebrities who have allegedly tried Lipoglaze include Strictly Come Dancing's Dani Harmer, Blue singers Simon Webbe and Antony Costa, and Lizzie Cundy.