She should put her mic completely away if she isn't going to sing it like we know she can. Paparazzi has two ways to be sung; high notes or lower notes, and she can SLAY with the high ones and the lower ones are also really good, and they seem easier for her so why didn't she just do them?
EDIT: really good points! She'll get more used to it for every show so I'm sure she'll do even better in a while, she tends to do so!