Jem Aswad Senior Music EditorThe Weeknd, who began sounding off on social media on Tuesday night over his being shockingly shut out of Grammy nominations in a year he dominated, kept up his criticism on Wednesday afternoon, posting a statement on Instagram that reads:“Collaboratively planning a performance for weeks to not being invited? In my opinion zero nominations = you’re not invited!”What that refers to, sources tell Variety, is the following:Along with most of the rest of the world, The