This is a cover from a 2009 issue of popular US music magazine Billboard which features prominently Jay-Z looking over a river with a cigar. The concept behind this seems to be retrospect with the black and white effect of the photo and the text talking of Jay-Z's past with his old record label. Cigars are usually associated with the older audience so Jay could be seen as being self-aware of his age and looking back on his decorated career as an elderly man would over his own life.
This is another issue of Billboard, this time from November 2010 and features Rihanna staring at the camera provocatively. The concept behind this seems to be reinvention, with the caption itself stating "The re-reinvention of Rihanna". This is potentially a pun as one of Rihanna's many nicknames is "Rhi-Rhi". With the way Rihanna is looking into the camera, it could be that this 'reinvention' is to a more adult, suggestive Rihanna. The line "My fans don't really know who I am" could possibly mean how her record label and pushed this 'good girl' image on her and she is trying to shed it for her real personality.