NEW YORK (AP) ? Lady Gaga has revealed that she suffers from post-traumatic stress disorder stemming from her rape at the age of 19. The 30-year-old singer made the announcement in an interview broadcast on NBC's "Today" show on Monday. Gaga was shown in a segment visiting a center for homeless LGBT youth in New York. She told a group that she has a mental illness that she struggles with every day and uses meditation to cope. Gaga's appearance was part of a campaign to inspire kindness.