Ghosts?

When Julie and Ariana walk into the studio to clean it Ariana finds a CD decided to play it

Ariana's concert

" I told you to keep them in the studio"I say
"I tried they just didn't listen"

The boys poof at Arianas concert and are amazed that she could do this stuff

(I do not own any of these characters and songs all of the credit goes to the rightful owners and this story is a little different from the original but ok