Rapper Wiz Khalifa was reportedly arrested earlier this week for possession of marijuana following a performance in Winston-Salem, North Carolina.  According to police, which didn't announce the arrest until Wednesday, units were patrolling the parking lot of Lawrence Joel Memorial Coliseum's parking lot after Khalifa's show and smelled parijuana coming from the rapper's tour bus.  Khalifa was previously charged with marijuana possession just last week in Nashville, Tennessee, but the charge was essentially just a ticket.  On the new charge, the rapper was arrested and later released on bail, and is scheduled to appear in court July 27th, when a rep said he will plead not guilty.