There's no shortage of awards shows for music, but this year's Billboard Music Awards feels like a standout. It's a divapalooza, with performances by Rihanna, Britney Spears, Celine Dion, Pink, Meghan Trainor, and Demi Lovato (Ciara, along with Ludacris, will host). Also, Madonna — nominated for Best Touring Act — will perform an homage to Prince during the Sunday night ceremony. Some have argued she's not the right choice for a Prince memorial — there was even a Change.org petition launched — but Billboarddefended its decision to book her. Get the popcorn ready. Sunday, 8 p.m. Eastern/5 p.m. Pacific on ABC.