. . . . . . "Knock You Down"@en . . . . . . . . . . "2009-04-07Z"^^ . "\"Knock You Down\" is a song by American singer and songwriter Keri Hilson, recorded her debut studio album In a Perfect World... (2009). The song features guest vocals from Ne-Yo and Kanye West. All three artists co-wrote the song with its producer Nate \"Danja\" Hills, as well as Kevin Cossom, Shaffer Smith and Marcella Araica."@en . . . . . . . . "326.0"^^ . . . . .