Celeb Spotlight: Babies Before Marriage

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Kim Kardashian and Jessica Simpson are just some of the stars bucking tradition and having children before they say "I do."

Video- Kim K. Exclusive: Pregnancy is Hard

Tomorrow on ET, we break down the celebrity couples who set to welcome their bundles of joy prior to making it official with their main squeeze.

Also Friday, the world's thinnest woman shares her heartbreaking story.