<ref name="Molanphy">{{cite web|first= Chris |last= Molanphy |date= July 16, 2012 |title= 100 & Single: The R&B/Hip-Hop Factor In The Music Business's Endless Slump |url= http://blogs.villagevoice.com/music/2012/07/sales_slump_usher_chris_brown.php?page=2 |website= [[The Village Voice|The Village Voice Blogs]] |accessdate= July 16, 2012 |archiveurl= https://web.archive.org/web/20120720033330/http://blogs.villagevoice.com/music/2012/07/sales_slump_usher_chris_brown.php?page=2 |archivedate= July 20, 2012}}</ref>
<ref name="The New Blue Music">{{cite book|title= The New Blue Music: Changes in Rhythm & Blues, 1950–1999 |first= Richard J. |last= Ripani |publisher= [[University Press of Mississippi]] |year= 2006 |isbn= 978-1-57806-862-3 |pages= 130–155, 186–188}}</ref>
<ref name="NewYorker">Frere-Jones, Sasha (April 3, 2006). {{cite web|url= http://www.newyorker.com/critics/music/?060403crmu_music |title= On Top: Mariah Carey's record-breaking career |archiveurl= https://web.archive.org/web/20060420191553/http://www.newyorker.com/critics/music/?060403crmu_music |archivedate= April 20, 2006}}. ''[[The New Yorker]]''.</ref>
<ref name="Rank">{{cite journal|title= Artists of the Decade Music Chart |url= http://www.billboard.com/#/charts-decade-end/artists-of-the-decade?year=2009&begin=1&order=position |magazine= Billboard |accessdate= February 8, 2011}}</ref>}}
