She's opening! But wtf is she gonna perform? There's quite a few options, take your guess

 

I've only included realistic options in the poll

I have a bad feeling it's gonna be you need to calm down :( hoping for the man or lover which are my next two predictions! Maybe she'll do a mash-up?

Voted for 'Lover' but I'm not sure if that's slight wishful thinking. Excited nevertheless!

Voted for You Need to Calm Down.

Has to be Lover, surely?

It’ll be lover.. with a guitar

Lover came to mind when I saw the topic title. I feel like she might want to take the opportunity to showcase "authenticity" and I think it would be the easiest song for the viewing audience to connect with. Certainly more so than Me! and You Need to Calm Down, even though those two would lend themselves to more eventful productions. Not sure if she'll throw a curve ball and perform something else. Will be interesting to see which song she goes with!

Wouldnt be suprised to see her do a medley