Photo: Kevin Mazur/Getty Images for AEG Please, please, please get ready for the Grammys on Sunday night. Sabrina Carpenter will be waiting. The 68th annual Grammys are kicking off the month of love, and all the lovers and haters are tuning in. Alongside Carpenter, there’s a special performance by Justin Bieber for Beliebers, as well as a special melody from the Best New Artist nominees, including Alex Warren , Addison Rae , and Leon Thomas . On a more somber note, Reba McEntire, Brandy Clark,