Photos of Camila Cabello performing to a nearly empty arena in Atlanta, Georgia, went viral this week, sparking a flurry of online criticism. The former Fifth Harmony member, 27, was blasted on social media after a user tweeted, “That s–t was EMPTY,” calling the singer a “flop.” CAMILA CABELLO EMPTY ARENA SHOW LMFAOOOOOOOOOOOOOO pic.twitter.com/Pjd0XMhrPX —…