Las Vegas is hoping DJ Khaled proves to be the key to winning over millennials. For a day and a half, the King of Snapchat committed the cardinal sin of Sin City: He made sure his 6 million digital followers knew what happened in Vegas. The hip-hop star was commissioned by the Las Vegas Convention and Visitors Authority to post and boast on Snapchat about the city's highlights. But why DJ Khaled? And why Snapchat?