"We [go] over really personal stuff from the woman's side of things", said Ciara of Kim.
Ciara is expecting her first child with rapper Future while Kim gave birth to her first daughter North West in June 2013.
Ciara and Kim Kardashian in 2014
The 28-year-old singer also admitted that the two girls love to talk about baby equipment – especially strollers.
"I'm obsessed with the Orbit stroller [Kim has] and she showed me how it works—the simplest things are so fun to you as a mom," Ciara admitted.
Ciara revealed that she was expecting a boy in March in the form of the cake and baby shower invite, which were both blue in colour.
She proudly took to Instagram to post a snapshot of the blue and white coloured cake which featured a blue pram as the topper and the words "Baby Love" emblazoned across the side.
Speaking to US Weekly, Ciara said of choosing her child’s name: "I went with what felt right in my soul and my gut. I didn't second guess it," and admitted that being pregnant has been a wonderful opportunity.
"I didn't even know what to expect, but it's been a very easy process. And it's been so much fun," Ciara continued.
Ciara and rapper Future
"Honestly, it's been the coolest experience in my life. Being able to know that I can do that is such a blessing. I'm literally obsessed with kids, so I'm excited about being able to have my own to obsess over."
And best friend Kim was also kind enough to throw Ciara her baby shower – making it a family affair by also inviting mum Kris Jenner.
Kim was quick to pout and pose next to close friends Ciara and television star La La Anthony, captioning a photo of the trio "#BFF'S."
In another snapshot, Kim was feeling nostalgic about her own baby shower as she posted a photo of the girlie group with the caption, "Celebrating @Ciara's baby shower today with @lala #mommymemories."