Watch Jay-Z and Mary J. Blige perform their Klassic Joint "Can't Knock The Hustle" live on David Letterman's show below:
WATCH: Jay Z & Mary J. Blige Perform "Can't Knock The Hustle" Live

Gage Skidmore , CC BY-SA 2.0 , via Wikimedia Commons First, he brought "SexyBack." Now, apparently, he's sold it to the highe...
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