Fallon, Timberlake go viral in hip-hop clip

FILE - In this Aug. 29, 2010 file photo, host Jimmy Fallon introduces a presenter during the 62nd Primetime Emmy Awards in Los Angeles. (AP Photo/Chris Carlson, file)

September 30, 2010 12:38:35 PM PDT
Jimmy Fallon and Justin Timberlake are the hottest duo in hip-hop - for the moment.