Speaking on her FUBAR Radio show this morning, Katie told fans that her birth certificate actually reads 'Katrina Amy Alexandra Alexis Infield'.
Within the next few weeks, Katie is due to give birth to her fifth child - a girl - and she is wondering whether to follow on with her name.
"My real name on my birth certificate is Katrina Amy Alexandra Alexis Infield. I don't know why my mum called me that!
"I might name this baby Katrina to follow on my name though."
Katie was then asked why she was never called Kat as a child: "I never thought about being called Kat," she admitted.
Pregnant Katie is expecting her daughter with her husband Kieran Hayler and, despite the recent cheating revelations, she is working at her marriage while he "receives help".
This weekend, the former glamour model is holding a baby shower for all her friends and family - and she's definitely going all out when it comes to activities!
"I've got my baby shower this weekend and I'm trying to get hold of pregnancy suits so the men can wear them," she admitted.
"I want them to do tasks and games while wearing them - they have to be in it the whole time. Going to the toilet, helping with the bbq. It's important for them to know how the pregnant mum feels."
Celebrities who have announced pregnancies in 2014:
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