Sexy cover shoot from the May 2015 issue of "Vogue" Brazil. The issue had photos of Rihanna completely topless.
Topless in a Medusa themed cover shoot for the November 2013 issue of British "GQ".
Source: GQ British
Posing topless with model Kate Moss for "V Magazine" in Spring 2013 for their "Dynamic Duos" issue.
Source: V Magazine
One cover from a seven part cover series at "Complex" magazine for their January 2013 issue. This particular cover was based off Rihanna's cover art from her album "Unapologetic".
Going completely nude (save the leather jacket strategically covering her nipples) for "GQ" magazine's December 2012 cover, the "Men of the Year" cover. Rihanna was dubbed the "Obsession of the Year" by GQ for the issue.
On the cover of "Esquire" UK for their July 2012 issue.
Source: Esquire UK
Posing for the cover of "Esquire" for their November 2011 issue.