R&B sensation Rihannaon Thursday unveiled "You da One," the second single from her upcoming sixth studio album, "Talk the Talk," which is set to hit stores in just ten days.  The pop star is allowing fans to "unlock" the song on her Facebook page, but you can hear the sing below.  The single arrives as Rihann's first single from the album, "We Found Love," is in its second week at the top of thre Billboard Hot 100 singles chart.