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Earlier that day, Rihanna and some gal pals kicked off the "holiday" with a bike ride, writing "What a crew," alongside this pic, and "Our #420 on #420 #clique" on another shot of her and her two-wheeling friends. As for what she's digging for in that purse ... we'll let you be the judge.

Rihanna's Busy '420' Weekend

Marijuana fan Rihanna marks 4/20 with a weekend of fun in Miami, including pot-themed cakes, a trip to a strip club, and a bikini-clad Sunday.