Jay-Z's Main Lady Vs. His Protege

We knew that dress looked familiar, and now we know why!

Good girl gone bad, Rihanna, first donned the black Versace Atelier dress from the Fall 2009 collection back in her seksi September 2009 spread for Vogue Italia.

And just 4 month later, Beyonce rocked the same frock during her amazing performance at the 52nd Grammy awards.

Both looked fierce in the triangular pieced dress, but who do U think wore it best???

[Image via Getty Images & Vogue Italia.]