Discovery, Daft Punk’s second album, came out in early 2001 and was a real departure from the duo’s first release. Whereas their first CD, Homework, drew from a range of influences while still staying true to Chicago- and Detroit-style electro music, Discovery focused more on a danceable disco and electronic sound engineered to produce hits. Some of the album’s tracks, including “One More Time,” “Aerodynamic,” and “Harder, Better, Faster, Stronger” were heavily played on the radio. The two robots also enlisted 90s house legends like singer Romanthony on two tracks and English musician Todd Edwards on “Face To Face.” The album climbed high on the charts throughout the world; between the US, France, and other international markets, 2.8 million copies were sold.