And the 'Diamonds' singer certainly turned heads during her visit, wearing a floor-skimming Chanel cardigan - and little else!
Despite watching a show by a brand famous for its prim and proper bouclé jackets, RiRi maintained her risqué edge by covering her modesty with just a few buttons.
The starlet paired her maxi cardi with oodles of Chanel pearls, a dinky quilted Chanel bag, and pointed heels by - you guessed it - Chanel.
And Rihanna clearly had a great time at the show, tweeting: "Went straight to the Chanel Couture show early this morning with NO SLEEP!!! It was so worth it!!!"
We totes agree, RiRi!
From babies to bikinis, the top showbiz stories from Monday in pictures:
Copyright: ITV Screengrab