Lambert was raised in his mother's Jewish religion. He has performed in Hebrew at Jewish events, singing songs such as "Shir LaShalom" (Song for Peace) at a 2005 tribute concert to assassinated Israeli Prime Minister Yitzhak Rabin.
Lambert has been a stage actor since he was about ten years old. The theater productions he performed in include You're a Good Man, Charlie Brown, Hello, Dolly!, Chess, Camelot, The Music Man, Grease, Peter Pan and Hair.
During his initial audition for the eighth season of American Idol, Lambert cited several musical influences, including Madonna, Queen, David Bowie, Michael Jackson, Aerosmith, and Led Zeppelin. Despite effusive praise from the judges, he finished second to Kris Allen. Although he failed to take the winner's place, Adam was invited to take part in American Idol' 10th Anniversary Album, released on March 15, 2011.
Lambert is openly gay, but refused to talk about his sexuality while he was a contestant on American Idol.
In 2009 Adam Lambert released his solo album For Your Entertainment, on which he worked with pop hit makers Lady Gaga, Greg Wells, Max Martin, Linda Perry, RedOne, Ryan Tedder, Evan "Kidd" Bogart, Sam Sparro, Kara DioGuardi, Alex James, Rivers Cuomo and Pink.
His top hit "Whataya Want From Me" is written by Pink, Max Martin & Shellback. Pink originally recorded the tune for her 2008 Funhouse album but cut the song off the track listing at the last minute and handed it off to Lambert. In 2010 she recorded her own version of the song.
Just before his debut album was launched, a new (old) track appeared with Adam singing vocals on it, which could have made him ineligible for American Idol. To give an explanation, Adam issued this statement through his official site: "Back in 2005 when I was a struggling artist, I was hired as a studio singer to lend my vocals to tracks written by someone else. I was broke at the time and this was my chance to make a few bucks, so I jumped at the opportunity to record for my first time in a professional studio. The work I did back then in no way reflects the music I am currently in the studio working on."
Lambert contributed the song "Time for Miracles" for the science fiction disaster film 2012. The official music video portrays Lambert walking placidly through a disaster scene, like those portrayed in 2012.
When Trespassing topped the Billboard 200 in 2012, Lambert became the first openly gay male artist to reach #1 on the albums chart.
Since 2011, Lambert has been the touring frontman for Queen. It was a gig it seems he was fated to do, having auditioned for American Idol
with "Bohemian Rhapsody