Grammys 2014: Jay Z, Justin Timberlake win rap-sung collaboration for 'Holy Grail'

Rapper Jay Z might have some ‘splainin’ to do when he gets home after Sunday’s 56 th Grammy Awards for taking the rap-sung collaboration award for “Holy Grail,” his track with Justin Timberlake from his “Magna Carta Holy Grail” album, over “Part II (On the Run),” the same album’s track he recorded with wife Beyonce for which both also were nominated.