Britney Spears & Rihanna Perfoming Together?

Britney is performing at the Billboard Music Awards in Las Vegas on Sunday, according to Us Weekly. TWICE! Britney will do one performance — potentially the opening number — with Rihanna, 23. The duo will perform Rihanna’s hit song “S&M.” Spears will also be performing for the first time ever with Nicki Minaj, 26. Spears and Minaj will partner up for a remix of Spears’ hit “Till The World