Glee's Lea Michele (@msleamichele): Woah that was so crazy! #XFactor was so fun tonight! Thanks for having me!
One Direction's Niall Horan (@NiallOfficial): Soo good to be on @TheXFactorUSA tonight! Big love to@simoncowell for having us! Good t see you ! And you guys for massive support
One Direction's Niall Horan @NiallOfficial: Just finished rehearsing for @thexfactorusa cant wait for tomorrow. Gonna be good! Lookin forward to seeing uncle Si @simoncowell
One Direction's Harry Styles (@Harry_Styles): Thanks to @TheXFactorUSA for having us,It was great to meet the contestants. I'm a huge @Beatricemiller fan.. #votebeatrice or Tate or both.
Mario Lopez (@MarioLopezExtra): At @TheXFactorUSA rehearsal & @KhloeKardashian momma@KrisJenner came and visited... #PromDate #HotMomma
Demi Lovato (@ddlovato): Come on America.. We gotta do better next week! Help us out!!#VoteDemiYoungAdults
LA Reid (@LA_Reid): Though I had to say goodbye to @jasonbroccoli, let me remind u I had 2 of the Top 3! @vinoalan & @tatestevensctry!
Simon Cowell (@SimonCowell): If there is one thing I learned if you like your act you have to vote
Britney Spears (@BritneySpears): So happy to see all of u out voting today. Keep the spirit alive tmrw for my teens on X Factor... maybe I can get online & vote with u?
Bethenny Frankel (@bethenny): Watching X factor & the talent of these amateurs is unbelievable. I would get up there and pee myself.
Tune in WED and THU at 8/7c on FOX.