In a recent interview with "Us Weekly" Jessica Simpson admitted to being very envious of Kate Middleton's almost transparent baby bump while sympathizing with the first time mom Kim Kardashian, who received a lot of criticism for her weight gain during her pregnancy.

"I felt for Kim -- I knew exactly what she was going through," Simpson said who was ridiculed for adding on a lot of pounds when she was pregnant with her daughter Maxwell. "I send a lot of love her way, and I know she'll come back with a bang."

Simpson added that she is confused why people would make fun of a woman who is pulling off the biggest miracle of them all, giving birth.

"I will never understand why people give pregnant women such a hard time," she said. "We are creating a human life: I think we get every excuse in the world to eat a doughnut!"

Along with Simpson, Khloe also came to her sister's defense.

"I find it disturbing that society loves to critique a woman's shape," Khloe wrote at the time. "That is low in and of itself, but I cannot tolerate one more vicious attack on my sister!"

As for Kate Middleton, Simpson was astonished how she could make pregnancy look so beauitful.

"Kate Middleton was glowing throughout her pregnancy," she said. "A lot of pregnant moms were looking at her like, 'How do you do that?!'"

"I am definitely one of those pregnant women who just gains a lot of weight," she continued. "I have really big boobs, I have my curves and I just gain weight. I can't help it. …It's been six weeks since I've had my baby now, and I feel great. …It's okay to gain weight, and it will always come off."