Singer Demi Lovato says her gay grandfather was a trailblazer.

Lovato discussed her late grandfather's sexuality for the first time publicly during Monday night's taping of Logo TV's upcoming Gay Pride special Trailblazers.

“I've never spoken about this before, but my grandfather himself was a trailblazer,” Lovato said. “He was brave enough to come out in the 1960s, and I feel a lot of my spirit has come from him.”

“He passed away a few years later and I only wish he could have been able to see all the progress that has been made,” she added.

Thursday's Trailblazers coincides with the one-year anniversary of the Supreme Court's decision striking down a key provision of the Defense of Marriage Act (DOMA).

Former President Bill Clinton, who signed DOMA into law, will honor Edie Windsor, who challenged the law, and Roberta Kaplan, the lawyer who represented Windsor.

Lance Bass will honor Brooklyn Nets player Jason Collins, the NBA's first openly gay player.

Also being honored is the cast of the Netflix hit series Orange is the New Black.

Trailblazers will be hosted by Daniel Radcliffe and feature a performance from A Great Big World. Also scheduled to appear on the show are Tegan and Sara, Ed Sheeran, Jared Leto, Kylie Minogue, Ariana Grande, Rita Ora, Iggy Azalea, Tyler Glenn and Mary Lambert.