The star shares the model with her ex-husband and Westlife singer Brian McFadden.
Kerry, 42, recently took to Instagram to share a mini album of images from her daughters big day.
The photos showed an incredible display at home as the mum-of-five procured a waist high model of the number 20 for her daughter, that was lit up by glamorous stage lights.
Surrounding this was an elaborate arch made up of gold, white and cream balloons.
Lily proudly struck a confident pose as she showed off the lavish decorations as she celebrated her big day.
The actress was seen in a gold party hat as she flaunted her strapped black heels, matching leather trousers and a white zip-up corset top.
In a second image, she could be seen posing by a second light display, this time in the shape of her name.
She captioned the post: “20 years of age!!”
The former Atomic Kitten recording artist also gushed about her daughter as she posted a series of throwback photos to further mark the special occasion.
This comes after Kerry drew controversy after she brutally slammed Molly-Mae Hague’s baby name choice.
She recently hit out that the former Love Island star should “change the name” of her newborn daughter to stop her from getting “stick” at school.
Writing in her column in OK! Magazine, Kerry said she wasn’t “a fan” of their Disney themed name choice.
“Molly-Mae Hague and Tommy Fury announced the birth of their daughter last week,” Kerry penned.
“It’s lovely news, but I must admit I’m not a fan of the name.
“I think Bambi Fury sounds a bit ridiculous. It reminds me of the Disney film where the mother gets shot!
“The poor kid might get some stick in school. If they haven’t registered the name yet, maybe they should consider changing it.”
Bambi, which was released by Disney in 1942, sees a baby deer named Bambi’s journey into adulthood after its mother is cruelly shot by a human.