After a difficult pregnancy, Simpson and Johnson welcomed their third child, Birdie Mae, on March 19, 2019. "We are so happy and proud to announce the birth of our perfect daughter, Birdie," the singer wrote on Instagram at the time.
Although Simpson told Ellen DeGeneres back in 2017 that she and her husband were done having kids because she already had two children that were "too cute" (and "you really can't top that"), Birdie has grown to be just as adorable as her older brother and sister.
On her fourth birthday, Simpson and her husband threw their youngest baby girl a unicorn-themed party, showing off the sweet celebration in an Instagram photo series. "Birdie Mae Johnson is 4!!!" Simpson captioned her post. "This adorable wonder of a unicorn kiddo illuminates every color in the rainbow . . . her favorite color . . . Birdie magically makes us laugh AT ALL TIMES capturing attention from EVERYONE! She is uniquely and effortlessly herself. This little lady celebrates and twirls through her life in tutus with a pure unique understanding in her soul of glitter sparkles. We love her SO VERY MUCH and she knows it. Birdie is a symphony of STARDUST and born to SHINE. I smiled the entire time writing this because even when she isn't home, I feel her presence glowing inside of me. Bird puts the HAPPY to the BIRTHDAY."
