Lily Allen is a British singer-songwriter known for her candid lyrics and rebellious persona. Her debut album "Alright, Still" featured a variety of genres and a provocative album cover reflecting her working-class background. Her breakout single "Smile" topped the UK charts in 2006. While maintaining her authentic style, Allen's second and final album "It's Not Me, It's You" showed signs of maturity through a simpler album cover and more polished sound. Over her career, Allen evolved as an artist but retained her individuality and candid personality.