The TV presenter was enjoying one of her last big nights out before the arrival of her first child, which is due very soon.
Katie looked radiant in her bright green gown, teamed with a leather jacket for an edgy look, at the Soho Sanctum Hotel in London on Tuesday (25 February).
The 30-year-old was at an exhibition by acclaimed photographer Ray Burmiston. She tweeted after her night: "Great night @sanctumhotels for @rayburmiston exclusive exhibition of @boxofgrey Empowering images, beautiful photography! (sic)."
For Katie, with a baby on the way, she couldn't indulge in the champagne on offer, telling fans: "Soft drinks for me now off home to feed the bump! Food calls!"
Katie is currently on maternity leave after her TV show Bodyshockers ended its latest run last week. It followed Katie – who suffered terrible burns in an acid attack in 2008 – as she travelled around the UK meeting people who had regretted modifying their bodies with things like tattoos and surgery.
Following the final episode, she said: "That's a wrap! Thanks for all ur #BodyShockers tweets tonight loved seeing your regrets and proud markings!"
Now, Katie, who has been with boyfriend James for two-and-half years, is in the final stretch of her pregnancy as she awaits the birth of her baby girl.
She told Reveal recently: "I've been through lots of medical procedures and lots of physical difficulties and now I'm going through physical difficulties with an amazing outcome so [the thought of giving birth] doesn't really bother me.
"I definitely feel my life right now is at a high point compared to the extreme lows definitely. I'm really enjoying what I'm doing as a career, I'm thrilled the foundation is going from strength to strength.
"Personally in my life I'm at a point where I didn't know I'd ever be so it's really amazing. I'm really grateful."
Celebrities who have welcomed babies in 2014 in pictures:
Copyright: Rex Features WENN/Matthew Taylor/Daniel Deme/Josiah True/Matthre Taylor/Joe