Justin Bieber has been linked to another legal drama after Canadian border patrol police in Michigan found marijuana and drug paraphernalia on one of the singer's tour buses on Sunday night (28Jul13). Specialist dogs sniffed out the pot and the authorities seized the small haul at the Ambassador Bridge. The driver of the vehicle was issued a citation and then released without further incident, according to TMZ.com. Bieber was not onboard at the time. More bad publicity of any kind is just what Bieber doesn't need following three recent spitting scandals, a couple of traffic citations and a much-publicised urinating incident, in which the singer was caught on camera peeing into a mop bucket in the kitchen of a New York restaurant. It's not the first time cops at the the Ambassador Bridge have halted a pop star's vehicle this year (13) - one of Rihanna's production trucks was stopped by border officials en route from the U.S. in March (13). The singer, who was not a passenger, had to delay the start of a show in Winnipeg, Canada as a result of the hold-up.