A tour bus carrying the concert production crew of singer Miley Cyrus overturned in Virginia on Friday morning -- reportedly killing its driver, with nine others suffering minor injuries.  The Associated Press reports that Cyrus, 16, was not on board the bus when it flipped on Interstate 85, about 40 miles south of Richmond. According to TMZ, the bus involved was part of a 4-vehicle caravan and included 14 passengers.  The bus apparently drifted off the road -- which was particularly wet from overnight rains. Authorities are not yet releasing the identities of those injured.