Born in Oakland, California on February 17, 1972, Billie Joe Armstrong is the lead vocalist, chief songwriter and guitarist for the rock band Green Day. He is also the vocalist and guitarist for a second rock band, Pinhead Gunpowder and sings, as well, for a garage rock band known as Foxboro Hot Tubs. Armstrong has an estimated net worth of $55 million. His interest in music began at an early age and, by the time he was 15, in 1987, Armstrong had formed his first band. It was called Sweet Children. This group morphed into its current manifestation, Green Day, in 1989. The band's third album, "Dookie," was released in 1994 and helped Green Day make the transition into becoming a mainstream rock band. To date, Green Day has sold more than 60 million albums worldwide and is one of the most popular bands working today.