A few weeks ago, singer Mariah Carey disclosed that she had been diagnosed with bipolar disorder. While her initial diagnosis came over 15 years ago, she has only recently decided to divulge details of her psychiatric illness to the public, a secret she kept out of fear and denial as reported in her interview in People Magazine. Bipolar disorder is a serious mental illness affecting roughly 3% of US adults.  It is a mental illness that is poorly understood and often misconstrued in the media.