The singer reportedly put down more than $1,500 in a sex shop while touring in Paris last week.
An onlooker told The Sun the 23-year-old was pretty much a sex shopping pro as she swept through the shops aisles at Lovestore, stocking up on all her, erm, necessary items.
"She knew exactly what she was after and didn't want any assistance picking out items," said the source.
"A blacked-out car parked on the pavement right outside the shop… There was no dithering. She was grinning from ear to ear and seemed to be in a hurry to get back to her hotel."
According to The Sun RiRi managed to rack up $1,500 in toys, handcuffs, candles, lingerie and erotic books in only 5 minutes.
5 minutes! Ooof, the girl was in a rush!
This isn't the first time the singer's been caught indulging in adult toys. In March she left a Sydney sex shop with two bags full of stock, in May she chatted to fans while buying a vibrator in Paris, and the most recent adult outing was at a sex shop in Ottawa, Canada.
Is RiRi a Good Girl Gone Bad? Or just a bad, bad girl…?