Katie, who is expecting her first baby in the next few weeks, tweeted the throwback snap to show how "innocent" she was as a child.
The TV presenter is currently fronting the C4 show Bodyshockers, which follows people who have modified their bodies and then regretted it.
Alongside the photo, Katie admitted that she once pierced her own ears - resulting in rather painful consequences. Ouch!
Katie told her Instagram followers: "When I was 14 yrs old I pierced my ears using a safety pin & ice cube. One ear got infected and my ear lobe split!
"[Mum] wasn't impressed! (p.s I thought this photo illustrated me as innocent before I experimented [with] altering my looks!).
Katie, who suffered horrific burns following an acid attack organised by her ex-boyfriend in 2008, definitely appears to be taking her pregnancy in her stride.
Earlier this week, Katie told Reveal how the thought of giving birth "doesn't bother" her given everything she's been through.
She said: "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 it doesn't really bother me."
Not long to go now, Katie!
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