• Sound sample from the song "Knock You Down"
• Song length: 5:26
• Reduced quality: yes
• Source : In A Perfect World...
• Songwriter(s): Keri Hilson, Kanye West, Shaffer Smith, Kevin Cossom, Marcella Araica, Nate Hills
• Performed by: Keri Hilson, Kanye West, Ne-Yo
• Producer(s): Danja
• Copyright ©2008, Mosley, Zone 4, Interscope

This is a sound sample from a commercial recording. Its inclusion here is claimed as fair use because:

• It illustrates an educational article that specifically discusses the song from which this sample was taken. The section of music used is discussed in the article in relation to the song's lyrics, musical and vocal style, and may contain part of the song's chorus.
• It is a sample of no more than 30 seconds from a much longer recording, and could not be used as a substitute for the original commercial recording or to recreate the original recording.
• It is of a lower quality than the original recording.
• It is not replaceable with an uncopyrighted or freely copyrighted sample of comparable educational value.
• It is believed that this sample will not affect the value of the original work or limit the copyright holder's rights or ability to distribute the original recording.
• The audio sample is a copyrighted work. U.S. copyright laws apply to this work. Should a free or public domain sample be located, it should be used in place of this audio sample.