The pop star made headlines last week after uploading pictures of herself throwing money at female strippers.
She has now posted on Twitter: "Guarantee to turn a square into a Bi bitch!!!"
The post is a reference to E-40 song 'Function', which contains the lyric "Guarantee turn a square to a bop bitch".
Rihanna reportedly angered Saturday Night Live producers by missing the show's dress rehearsal before her performance on the May 5 episode.
In April she caused concern by posting pictures on Twitter showing her sitting on the shoulders of her bodyguard, who appeared to have white powder on his head.
Photo gallery: Good Girl Gone Bad - Rihanna's career in pictures:
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