It's been six months since the singer/actress/entrepreneur gave birth to her third child, daughter Birdie Mae Johnson, and Simpson says she's spent that time putting in hard work.She recently posted a photo of herself on her official Instagram account, showing off her 100-pound weight loss.In it, Simpson is dressed all in black, sporting a belt that highlights her waist and accessorized with large shades and a handbag."6 months. 100 pounds down (Yes, I tipped the scales at 240)," the caption reads. "My first trip away from #BIRDIEMAE and emotional for many reasons, but so proud to feel like myself again. Even when it felt impossible, I chose to work harder."Simpson has had well-documented struggles with weight in the past and even once had a dealRead More – Source