Rihanna's entourage has a little issue keeping things low-key. The superstar singer's tour bus was searched on Wednesday (March 20) as it was getting ready to cross the border from Canada into Detroit.

An investigator smelled weed coming from one of the vehicles. A drug-sniffing canine later found a small amount of the drug on a male passenger. As much as Rihanna shares her love for the sticky green via her social media accounts like Twitter and Instagram, she wasn't on any of the four buses.

“One of our border protection officers referred the caravan for inspection due to a strong odor of marijuana,” Kris Grogan, a spokesman for U.S. Customs and Border Protection, told the Daily News.

Rihanna is no stranger to marijuana and has embraced the substance in her music videos and various photos she shares on her Instagram page.

The singer was performing in Toronto on Monday and Tuesday and will be taking the stage in front of the "Motor City" tonight as part of her Diamonds World tour.

Watch Rihanna's 'Diamonds' Video