Photos: Rihanna and bff celebrate 420 (weed-smokers day)

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Rihanna and her bff Melissa shared pics on their instagram pages yesterday showing them celebrating 420, which is a code-term that refers to the consumption of cannabis, according to wikipedia. It's like a weed-smokers day, celebrated every April 20th of the year around the time 4:20 p.m. See more photos after the cut...

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