If she wants to open with more than Una then she needs to do SNL again and with a song that's just as good or even greater quality than FFS, I think a midtempo would actually suffice. This time around it's all about growth, and most importantly showing people why she's still here 10 years later.
Just as it was about to drop out the top 3 for the uk and top 10 for the us it's shooting back up again, Grammys hopefully will send this to #1 and keep it there if their performance is iconic enough
