And he didn't mention anything about a "Scream & shout" performance , so stop inventing rumors
He said "she will bring out a special guest" and posted a GIF of the Scream and Shout video. There's no other collaboration in the set list Jordan posted either.
I'm gonna miss Chris, he is a good poster (for now), he has improved a lot since he had that terrible X factor meltdown ..... Shame he didn't keep it cute.
I know this bitch better bring it on the 17th. She better be serving Mannequin rehearsal realness on the 17th.
!!!!!!!!!!!!!!!!
I'm trying hard not to get excited though, I don't wanna be disappointed again. She needs to kill it, I don't remember her going to the dance studio this much in the FF era so well see but yeah I'm not getting my hopes up.
Couple more days.
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But it could definitely use the promo, so MAYBE! 
im not here for a born this way mess