The 38-year-old Californian has hypnotherapy sessions once a week to make her more easily confused and vacant.
Blondie, who changed her name a year and a half ago, has also spent £25,000 on five boob jobs taking her to size 32JJ.
And she regularly has spray tans, Botox and lip fillers to give her a more artificial appearance.
But to make the transformation into the plastic toy complete, she is training herself to become more stupid.
The former size 0 model said: "When people ask why I want to be Barbie I think 'who wouldn't want to be?'
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Barbie-Obsessed Blondie Bennett Turns Into Real Life Doll
"She has the best life. All she does is shop and make herself look pretty - she doesn't worry about anything.
“I’ve had 20 sessions and I’m already starting to feel ditzy and confused all the time.
“Recently I went to pick a friend up at the airport and couldn’t remember if I needed to go to departures or arrivals.
“I also got lost for three hours driving to my mum’s house - the house where I grew up."
Blondie says her obsession with Barbie began at a young age when played with the children’s favourite.
In her teens she dressed like Barbie, bleached her hair and even had driven a Corvette like her hero.
Then at age 18 she took on promotional jobs at toy stores pretending to be Barbie.
Blondie said: "People thought it was just a phase but I thought to myself as soon as I move out of home I'm going to turn myself into Barbie.
"My friends hated the attention I got from guys because of how I dressed. They told me to tone it down when I went out with them.
"I was forced to live a double life until about eight years ago when I decided to become Barbie for real and ignore what other people said."
Last August eight-stone Blondie had her H cup implants increased to a JJ with 1700cc saline implants.
And in December she had chin liposuction to contour her face more in line with Barbie.
She said: "Some other women pretend they are human Barbie dolls but I take it to the next level.
"I want people to see me as a plastic sex doll and being brainless is a big part of that.”
Unemployed Barbie has her rent paid for by online sugar daddies who support her transformation in exchange for sexy pictures of her dressed as Barbie.
She said: “People can criticise me but this is who I am - I want my transformation to be head to toe, inside and out."