Rihanna Tour Bus Stopped: Cops Find Weed Onboard "Stay" Singer's "Diamonds" Tour Bus

Authorities at the Michigan-Canada border report that they stopped all ten of Rihanna's tour buses last night. According to TMZ, the officials searched the buses and found weed.(Pics HERE)

The buses were stopped on the Ambassador Bridge, which connects Detroit to Canada. Authorities became suspicious when they smelled marijuana on one of the buses. They went back and began to search all of the buses.

The cops brought drug-sniffing dogs on board and upon searching one of the buses, a dog alerted on a passenger who was found to be in possession of a small amount of pot. He was cited with a civil penalty.

Apparently, Rihanna was not on any of the buses.

This is just more trouble for the Barbadian star's "Diamonds" world tour. Recently,  RiRi had to cancel several shows in the tour's first week due to a bout of laryngitis. This weekend Rihanna showed up two hours late for a show in Montreal , though fans seemed to take the wait in stride offering her a warm reception when she took to the stage.

(Compare this to Justin Bieber, who was recently booed at London's 02 arena for showing up 2 hours past the shows start time.)

Rihanna took to twitter to thank fans for understanding.

"#MONTREAL You owned my LIFE yesterday!! Thank you for that, you were BRILLIANT!! #DiamondsWorldTour," she wrote.

Rihanna has been in the news lately for a rumored marriage to troubled R&B singer and on-again, off-again boyfriend Chris Brown.

The story about a rumored Carnival-style wedding broke in Now magazine.

"She wants to get married in her bikini and have a carnival atmosphere. They want it to be relaxed and fun, like a "playground", and to celebrate with the people who have stood by them," an unnamed insider told the magazine.

What do you think? Is the Diamonds World Tour set to be doomed?

Sound off in the comments.