Wiz Khalifa's Red Carpet Run-In With the Law

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Wiz Khalifa arrives at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. 

The rapper was brazenly blazing, to the dismay of an on-duty police officer.

The always brazen Wiz Khalifa may have taken his fondness for smoking pot anywhere at anytime a bit too far when the rapper began blazing on the red carpet at the Billboard Music Awards -- and was quickly chastised by a Las Vegas police officer. 

According to photographer Jeff Kravitz, who was on hand to shoot arrivals at the MGM Grand Garden Arena ahead of the May 17 show, Khalifa made his red carpet entrance amidst a plume of smoke and was -- not surprisingly -- all smiles for his close-up in front of the step-and-repeat.

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Only the rapper, who spends much of his time in Los Angeles, where, like Las Vegas, marijuana is legal for medicinal use, didn't expect to get so close to one uniformed representative of the LVPD, who was not at all amused by the hitmaker's bravado, allegedly telling Khalifa something along the lines of: "Do not light that in my face again or we will take a ride downtown."   

Says Kravitz, who shared the story and the below photo of the near-altercation on his Facebook page, "It might be legal for medical in Vegas, but the cops don't have the tolerance they do in L.A."

Wiz Khalifa, Charlie Puth & Lindsey Stirling Perform 'See You Again' at the 2015 Billboard Music Awards

Fortunately, the smoke had cleared soon after the carpet run-in and Khalifa was able to enjoy the rest of his night, which included two performances on the BBMAs stage -- the first joining Fall Out Boy for their hit "Uma Thurman" and the second leading Charlie Puth and Lindsey Stirling on his own Billboard Hot 100 No. 1, "See You Again."

Billboard has reached out to Khalifa's rep for comment.