Learn slimming secrets from 3 past guests. See their amazing results and get inspired to look your best this summer. Click here to take Dr. Oz's Ultimate Summer Slimdown challenge and get ready to hit the beach!

After years of trying to get pregnant, doctors told Kelsi Pierce it would be near impossible for her to conceive a child. However, Kelsi got the surprise of her life when her mom volunteered to be her surrogate — and she found out she, too, was pregnant!