“Knock You Down” is one of the most played and best scoring tracks from Keri Hilson’s debut album. Keri Hilson created this R&B song in collaboration with Nathaniel Hills, Marcella Araica, Kevin KC Cossoma, Shaffer Smith, and Kanye West. It received favorable reviews by the critics, who appreciated the combination of Keri Hilson’s and Kanye West’s vocals. A “Newday” reviewer went as far as to sat that “the initial rap verses by West make the song interesting, but Hilson’s vocals make it perfect.” That pretty much exhausts the topic. The single, produces by Danja, soon won the hearts of fans in the United States. Initially it occupied the 65^th position in the Billboard Hot 100 chart, but just a week later it jumped up eleven places, and after the next eleven weeks it became third, making it the most successful single promoting “In a Perfect World…”. We should also mention that the album’s popularity was not confined to the United States alone, but proves a great success in New Zealand as well. A week after the release it sprang up to the tops of album charts.