Sheryl Crowrevealed that she has a benign brain tumor, but her rep says it's nothing to be alarmed about. The 50-year-old told an audience about her condition at a recent concert, but her representative Christine Wolff said it's very common. The tumor is a meningioma and it's typically benign and develops from the protective linings of the brain and spinal cord. Wolff said that Sheryl is doing great and is healthy ...