Adam Lambert believes opposition to gay marriage is rooted in fear.

The 30-year-old Lambert is set to headline a fundraiser concert to benefit Marylanders for Marriage Equality, the group working to uphold a gay marriage law approved by Maryland lawmakers.

“I think there's a lot of fear among people who oppose gay and lesbian marriage,” Lambert told the Washingtonian. “I personally believe you're born one way or the other. Some people think it's a choice. I think the only choice involved is whether you're going to be honest about who you are or not, and I'm really big on honesty. If this is something we can get passed, what we're doing for the next generation is lifting a ton of shame and guilt and secrecy off of the LGBT community. The clichés attached to the gay community were born out of shame and secrecy, and if we can get rid of those things, we'll end up with a lot more happy, normalized gay and lesbian kids.”

The concert will be held on Tuesday, September 25 at the 9:30 Club, the legendary live music club located in the U Street neighborhood of Washington, D.C. Tickets, which start at $125 and go up to $250, can be purchased through or at the 9:30 Club.