Singer Adam Lambert made history this week when his sophomore album Trespassing debuted at Number One on Billboard's album chart.

The 30-year-old Lambert is the first openly gay male artist to top the chart.

Trespassing sold 77,000 copies according to Nielsen SoundScan, making Lambert the seventh American Idol finalist to climb to the top spot on the chart.

Lambert officially came out gay on the cover of Rolling Stone after competing on the talent show. But more recently he's said that even while on Idol he didn't actively conceal his sexual orientation.

“I was out of the closet the whole time [I was on American Idol]. The whole time. No one ever said to me, Ryan Seacrest didn't go, 'You gay?'” he told Chelsea Lately host Chelsea Handler.

In discussing Trespassing, Lambert told NPR that the track Outlaws of Love is about the discrimination faced by gay people.

“Yeah,” Lambert told Guy Raz. “And when I wrote that song … there had been a lot going on with, you know, the gay marriage, kind of going back and forth in California,” he said, referring to the legal challenge to Proposition 8, the state's gay marriage ban. “And it just made me sad. And so I wanted to write something about that sadness, about that feeling where sometimes it's like a hopelessness that kind of comes over you when you look at the situation. How you're probably not going to change these people's minds because they're set.”