Pros: Looked great,
lots of energy,
decent choreography at times,
great songs
Cons: Lots of walking,
not so decent choreography at times,
lip synching + no pre-recorded vocals for some songs,
she didn't flow well with some of the choreography,
not so much of a hits-medley
She showed up so I'll give her a 3. I mean there was nothing about it to be proud of or excited about. She lip synched like always and didn't do anything amazing like swallow a sword or juggle snakes. I have zero tolerance for acts that go on stage and flail around without singing. I find it disrespectful to the audience and the craft. I don't even like playback as support, that's what background singers are for.
If you're not going to use your voice, at least do something incredible.