The 32-year-old reality TV star is expecting her first child with boyfriend Kanye West and has been studying pictures of the Spice Girls star-turned-fashion designer - who has children Brooklyn, 13, Romeo, 10, Cruz, seven, and Harper, 18 months, with husband David Beckham - to get ideas on staying chic as her figure expands.
A source told the Daily Star newspaper, "Kim loves Victoria's VB range to complement her curves. Now with a burgeoning bump on the way, she is following her style closely.
"Kim spent hours with her mum, Kris Jenner, and her glam squad going through pictures of what Victoria wore during all her pregnancies.
"She wants to look classy and not frumpy while carrying her child."
This is not the first wardrobe overhaul the Keeping Up with the Kardashians star has undertaken in recent months.
Shortly after she began dating Kanye, 35, she allowed him to go through her closet and get rid of some of her clothes, as well as introducing her to his stylist, and she recently claimed he has made her more sophisticated as a result.
She said, "I've grown up a lot this year. My style's more sophisticated. And that's from my boyfriend, who's a designer, to just having my personality evolve.
"I think all boyfriends and girlfriends give each other tips and ask, 'Do you like this? Does it look good?'
"It wasn't like he came in and said, 'Oh my God, let me give you this makeover.' I wanted a new stylist and he suggested his.
"I would overdo it before. I'd wear a short skirt with my boobs out, necklace, earrings, rings, bracelets and high platforms.
"I cover up more and wear one accessory, if any. Everything is more muted, the colours, my make-up. I don't even wear fake lashes as much any more."