Down (feat Kanye West & Ne Yo) Sin... | Knock You

: It reached #3 on the Billboard Hot 100 and topped the Hot R&B/Hip-Hop Songs chart in the U.S.. Internationally, it hit #1 in New Zealand and reached the top five in the UK and Ireland.

The lyrics explore how a powerful love can unexpectedly "knock you down," often depicted as a metaphor for falling so hard for someone that it disrupts your usual composure.

: As of April 2011, the single had sold over 2.1 million digital copies in the United States.

: Kanye West’s verse famously references Michael Jackson and his father Joe Jackson , which drew significant attention as the song was released around the time of the singer's death in 2009. Music Video

: The song presents a narrative arc. Hilson describes a perfect love gone wrong, Ne-Yo represents a new, fulfilling love, and Kanye West provides a rap interlude reflecting on the heartbreak of a lost relationship.