Former Sports llustrated swimsuit model Kathy Ireland just revealed some absolutely shocking photos of herself. Check them out -- she's barely recognizable.

When her son told her "Mom, you look pregnant," Kathy Ireland tells People she "could not recognize the person I saw."

The former top model looked as if she had completely let herself go -- and she had! She says she put on 25 lbs without even realizing it, all while taking care of her three kids and running a multi-billion dollar design empire.

In her new book, "Real Solutions for Busy Moms," Ireland talks about how mothers tend to put everything ahead of themselves. She discusses how she got back on track with the help of a friend who is a personal trainer and nutritionist.

Her goal? "To be healthy, to be there for my husband and kids ... not to get back into a bikini!"

Click to see celebs who have gone from flab to fab!