Lady Gaga reveals she has PTSD, says it's one of her 'deepest secrets'

FILE - In this Feb. 28, 2016 file photo, Lady Gaga arrives at the Vanity Fair Oscar Party in Beverly Hills, Calif. One of the country's most impoverished cities will get some time in the Democratic convention spotlight Thursday, July 28, 2016, with some help from Lady Gaga. Thousands of convention delegates have been invited across the Delaware River to Camden for an afternoon concert with the pop star. (Photo by Evan Agostini/Invision/AP, File)

Lady Gaga opened up for the first time to reveal she suffers from post-traumatic stress disorder stemming from her rape at the age of 19.

The "Million Reasons" 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. She says the kindness that's been shown to her by doctors, family and friends has saved her life.

Gaga later said on Twitter that in telling her story, she shared one of her "deepest secrets" with the world.

The Associated Press contributed to this report.