The same day as rapper Too Short was reportedly arrested in Los Angeles, California for drunk-driving and drug possession, another music star of a different generation made headlines. While no arrests were reportedly made, TMZ.com reports that marijuana was discovered on Def Jam Records singer Rihanna‘s tour bus, as the vehicle passed between the United States and Canadian border. TMZ accounts that only a “civil penalty” was issued to a reportedly male passenger on the bus as it approached the Ambassador Bridge, linking Windsor, Ontario with Detroit, Michigan. The stopping included 10 overall vehicles. It has not been fully confirmed if Rihanna was on that particular bus at the time of the citation. Tomorrow night (March 21), Rihanna is expected to bring her Diamonds World Tour to Detroit’s Joe Louis Arena. Last week, RiRi was forced to cancel two dates following flu symptoms and Laryngitis.