From SFTA, Rihanna sported a brand new tatt when she hit the stage last night during her 2009 American Music Awards performance, an ode to the title of her upcoming CD, “Rated R.” For those of you who think Rih Rih has enough ink, don’t fret. According to the Huffington Post, the “Rated R” tatt is temporary and she’ll be as good as new tomorrow.