Hip hop fans get ready. Jay Z's Facebook page holds the key to the 'Holy Grail' music video. The hit new single from Jaz Z's album 'Magna Carta... Holy Grail' features Justin Timberlake and premiered only on the rapper's Facebook page, making him the first artist to post a music video exclusively to the social media platform. In less than a few hours, the video had over 34,000 likes and over 24,000 shares. Krystin Goodwin has the story.