Jana Duggar

TLCTLC

Jana Duggar, 26, is the oldest Duggar daughter, and is a twin to John David. She's a skilled midwife -- she even assisted her sister Jill during the birth of her first child -- and does interior design and home improvement in her spare time.

Living with her family in Arkansas, Jana is also a classic older sister, helping and mentoring her siblings (and providing tips and tricks along the way).