Bad Religion is an American punk rock band that formed in Los Angeles, California, in 1979. They make extensive use of three-part vocal harmonies (which they refer to in their album liner notes as the "oozin' aahs") and guitar solos, and are known for their lyrics, which cover topics such as criticism of religion, political commentary and social responsibility. The band's lineup has changed several times over its lifespan, with lead vocalist Greg Graffin being the only consistent member; the current lineup, however, features three of the band's four original members (Graffin, Brett Gurewitz and Jay Bentley). To date, Bad Religion has released sixteen studio albums, two live albums, three compilation albums, three EPs (one of which is composed of covers of Christmas songs) and two DVDs (which were both recorded live). They are considered to be one of the best-selling punk rock acts of all time, having sold over five million albums worldwide.