But now it's straight up cancelled!
Ticket holders were sent the following email on Friday:
[Image via Fayesvision/WENN.]
"If you could duet with any artist who would it be? [I] would love to do a duet with Robbie Williams," she Tweeted.
That would be AMAZEBALLS! Let's make that happen.
P.S. CLICK HERE to "follow" Perez on Twitter!