Paige Harker, 16, suffered five years of bullying while at school, so her mum decided to splash out more than £1,600 on giving Paige a "dream" prom.
That included hiring the Cinderella-style carriage that Katie used when she married ex-husband Peter Andre back in 2005.
Writing in her weekly column for The Sun, Katie said the story had made her smile, adding Paige had "outshone" her classmates.
"Paige looked beautiful, and beaming mum Hayley is rightly very proud of her daughter for overcoming bullying. You are stronger and so much better, Paige."
Along with the carriage, Paige was treated to a £240 custom-made blue gown jetted in from China, designer perfume, jewellery and cosmetics, including eyelash extensions.
Paige's mum Hayley told the newspaper: "She had such an awful time at school. I didn't want her to drop out, so I decided to try and convince her to stay with the promise of an amazing prom."
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