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16. Mariah Carey
In 2011, 42-year-old Mariah Carey gave birth to twins Moroccan and Monroe with her then-husband Nick Cannon on their third wedding anniversary.

But that's not to say that her pregnancy was a breeze. The couple went through miscarriages, and her overall pregnancy was tough. She told US Weekly, "My body went through so much. Holding those twins in — you have to keep them in as long as possible. It's a sacrifice you make for them. Literally I was like, 47-weeks pregnant"