"Down" is a song by British singer Jay Sean featuring American rapper and labelmate Lil Wayne. The song was released in North America as his debut single from his first album there, All or Nothing. In other markets, including the United Kingdom, the song serves as Jay Sean's lead single from his third studio album. Produced by J-Remy and Bobby Bass, "Down" is the seventh-best selling single of 2009 and has been certified Platinum in several countries. The song went on to sell six million copies in the United States.

Kamaljit Singh Jhooti, better known by the stage name Jay Sean, is a British singer and songwriter. He debuted in the UK's Asian Underground scene as a member of the Rishi Rich Project with "Dance with You", which reached No. 12 on the UK Singles Chart in 2003. This led to him being signed to Virgin Records and having two UK top 10 hits as a solo artist in 2004: "Eyes on You" at No. 6 and "Stolen" at No. 4. They were included in his critically acclaimed debut album Me Against Myself which, though only moderately successful in the UK, sold more than two million copies across Asia and remains his most successful album to date. Alongside the Rishi Rich Project, Sean was a pioneer of Bhangra-R&B fusion, which his debut album helped popularize among the worldwide South Asian diaspora.