The 29-year-old beauty, who dated the 35-year-old musician for most of 2010, told Foxnews.com: "I think Kanye is going to be an amazing father. I think he will be really good at it."
Selita, who is now dating actor and E! News presenter Terrance J, insisted she wishes Kim, 32, and Kanye, nothing but the best and thinks their baby is going to be "one of the best dressed kids in the world."
Kanye has just arrived back in Los Angeles with his girlfriend of almost a year, after enjoying their second babymoon in Rio de Janeiro.
The couple were spotted taking in the sights with actor Will Smith in recent days.
Kim allegedly wants to employ three members of staff to assist with their new arrival, and is willing to spare no expense when it comes to treating the employees well.
A source previously said: "As with everything Kim and Kanye related, they're not holding back.
"Each of the nannies will receive a salary of around 130,000 Pounds per annum. They will be given a car each and new phones so that they can stay in contact with Kim and Kanye around the clock.
"They want to build a wing on their mansion with three bedrooms, three bathrooms, a second nursery, a kitchen and a spa area for their new employees.
"Kim and Kanye feel it's important to have a separate area marked off so that they can still spend time alone as a family."