The mother-of-four was snapped pushing her son along a street in London after tweeting to her 1.8 million followers she was off to get some Botox.
She kept wrapped up warm in a cape, which we think is her favourite hooded one from Lara's Fashion, now £49.
Katie, 35, has kept her youngest child, Jett, mostly hidden from the cameras since his birth over the summer, and today was no different as he was safely ensconced in his pram with his face shielded from the snappers.
While we presume Katie booked her appointment weeks in advance, her outing ended up being on the same day ex-husband Peter revealed his engagement to girlfriend Emily MacDonagh.
Peter confirmed his happy news the same month that he and trainee doctor Emily became parents to an as-yet-unnamed baby daughter.
Katie hasn't reacted via Twitter although we didn't really expect her to as she's moved on too and is happily married to husband Kieran Hayler and has a new baby of her own.
The star married Kieran in the Bahamas in January 2013 following a Christmas proposal and whirlwind romance. They welcomed their first child together, Jett Riviera, that summer.
She told Reveal last year: "The marriage I have with Kieran now is what I call a proper marriage. No one interferes and I haven't even had an argument with Kieran yet. My marriage is not my career, it's my relationship."
Katie is also mum to son Harvey, from her relationship with Dwight Yorke, and children Junior and Princess from her marriage to Peter.
In January last year, the model-turned-businesswoman sent her best wishes to Peter and Emily, saying: "I wish Pete nothing but love and luck with his relationship with Emily who seems delightful."