William Patrick "Billy" Corgan, Jr. (born March 17, 1967 in Chicago, Illinois, U.S.A) is an American vocalist, guitarist, and songwriter best known for his work in the the now-disbanded alternative rock band The Smashing Pumpkins. The Pumpkins were one of alternative rock's biggest acts, known for their complex layered sound, Corgan's scathing guitar and self-described whiny vocals, and making use of elaborate and evocative fantasy imagery. The Smashing Pumpkins produced five major albums, including the widely-acclaimed and commercially successful albums Siamese Dream (1993) and the follow-up double album Mellon Collie and the Infinite Sadness (1995).

Early years
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Corgan moved from Chicago to St. Petersburg, Florida in 1985 with his first major band, The Marked, named for the noticeable birthmarks of Billy and Ron Roesing, the drummer. The band lasted for around nine months and disbanded, with Billy returning to Chicago to live with his father.

While working at a record store there, he met up with guitarist James Iha through a friend. He then met bassist D'Arcy Wretzky at a local show and soon formed The Smashing Pumpkins. The trio began to play together at local clubs with only a drum machine for percussion. The band tried to book a show at the Cabaret Metro, a notable Chicago venue. Metro owner Joe Shanahan refused to let the band play until they found a live drummer. The band was introduced to jazz fusion drummer Jimmy Chamberlin by a mutual friend. Chamberlain didn't align with the band at first, but thought they had potential--thus he joined the group. The Metro show on April 10, 1988 was the band's first show with the full lineup. The Pumpkins continued to have a close relationship with the venue, playing new tracks there frequently and playing the band's final show at the Metro more than a decade later. The new band fused diverse threads such as psychedelic rock and heavy metal into a distinctive sound on their inaugural album, Gish (1991).

Popular success
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The Pumpkins signed to major-label subsidized Caroline Records to record Siamese Dream. The Pumpkins became known for their elaborate production techniques, layering dozens of different tracks over one another with a wide variety of effects. Siamese Dream's "Soma" uses over 40 guitar tracks alone. The band became known for internal drama during this period, with Corgan frequently characterized in the music press as a control freak who reportedly went so far as to unilaterally erase other band members' studio tracks and rerecord his own performances over them. The reality of the situation was Corgan had developed a deep depression and worked overtime for both Gish and Siamese Dream, recording some of the guitar and bass tracks for the former and almost all for the latter. Guitarist Iha and bassist Wretzky were losing interest in the band during that time period due to a messy break-up. Corgan even went on record saying if Siamese Dream didn't sell well, he would break up the band. The album was well received by critics, and the songs "Today" and "Disarm" became smash hits, with the accompanying music videos receiving heavy airplay on MTV.

Their 1995 followup effort, the massive 2 disc set Mellon Collie and the Infinite Sadness, was even more wildly successful, spawning a string of hit singles and eventually a box set (The Aeroplane Flies High, 1996) of songs recorded during the Mellon Collie sessions which were cut from the album. The album was nominated for seven Grammy awards that year and would eventually sell several million copies, making it the best selling double album of all time. With the expanded resources now at their disposal, production values became even more elaborate, and the band branched out beyond their hard rock roots, featuring, for example, dense orchestral accompaniment on "Tonight, Tonight", ethereal pieces leaning towards rock-electronica ("1979"), and a soft piano intro track. The album also included a number of more traditional metal-driven guitar-based tracks, such as the first single, "Bullet with Butterfly Wings", and "Zero".

During the album's tour, the band was plagued by Chamberlin's heroin addiction. On July 12, 1996, Chamberlin and touring keyboardist Jonathan Melvoin overdosed in a hotel room. Chamberlin survived, but Melvoin did not. The Pumpkins were forced to fire their disgraced drummer. They completed the tour with Filter drummer Matt Walker and Frogs keyboardist Dennis Flemion, but the band missed the intense energy that Chamberlin's drumming provided.

Later works
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Their next effort, 1998's Adore, was undertaken with drum machines and studio drummers in place of Chamberlin, and consisted mostly of subdued material. Corgan's mother Martha passed away from cancer during the making of the record, and in the absence of Chamberlin