GEDDES -- Despite ongoing worries that Justin Bieber's illness will prevent him from performing tomorrow night, State Fair Director Dan O'Hara tells CNY Central the show is still on.

Bieber was supposed to perform at the Fair grandstand on Sunday night but had to postpone due to an illness. The show was moved to Wednesday night but persistent rumors over the last few days have questioned his ability to perform at Madison Square Garden tonight and at the NYS Fair tomorrow.

However, Bieber appears ready to perform, if his Twitter account is any indication. About ten hours ago he tweeted the following message, "Tomorrow is a celebration....we are living a dream and playing MADISON SQUARE GARDEN in NYC!! WHO IS COMING!!?!?!? SEE U THERE!!!!!"  

Fair organizers are expecting a packed house tomorrow night. Along with Bieber's performance, popular country group Lady Antebellum will play a free show at the Chevy Court.