Bipolar disorder, also known as manic-depressive disorder, is a mental illness that affects many famous people, including Demi Lovato, Catherine Zeta-Jones, Mariah Carey, Kurt Cobain and Jean-Claude Van Damme. Bipolar disorder is characterized by extreme shifts in mood, energy, and activity levels, and can affect how people think, feel, and interact with others. Treatment typically involves medication, therapy, and lifestyle changes. With proper care and support, those living with bipolar disorder can lead meaningful and productive lives.