Steve Jennings/Getty ImagesJada Pinkett Smith is suffering from the autoimmune disorder alopecia, which causes hair loss. The Matrix Resurrections star opened up about the disease Wednesday in an Instagram video. "Look at this line right here," Jada said as she ran her finger across a bald line patch along the center of her scalp. But now that she's shaved her head, Smith plans to get creative: "Mama's going to put some rhinestones in there. I'm going to make me a little crown." The 50-year-old entertainer captioned the video, "Mama's gonna ha...