Liam Gallagher achieved both fame and notoriety as the lead singer of Oasis, the band who defined Brit-pop in the 1990s. By the early 2000s, Gallagher began stepping out of the shadow of his brother Noel (the songwriter who penned most of Oasis' hits), contributing original tunes to the band starting with the 2003 single "Songbird." The siblings ...