Rihanna stepped out in LA in a super cute $630 Pendleton for Opening Ceremony Backless Pencil Dress:
The scoop necked beaut (now on sale for $179) has a navajo print, a low back, and a flattering pencil silhouette.
Not sure of the make of her bag, but you can definitely get a similar look with this $90 Christian Audigier cross body fringe tote:
This is a relatively affordable look for Rihanna, no?
If so, get her dress, plus a few more options here: