Marie's brother Donny accompanied the singer to the hospital where she was treated for bronchitis. Marie, 52, had some problems with her voice during the performance and later tweeted, "So the allergies went into a bronchitis. Didn't realize it until I went to hit the high notes last night on stage."
Marie was cleared to resume performing on Thursday. The duo is currently performing at the Flamingo hotel through Nov. 26. Although no dates have been canceled, some of the numbers from the show may be shortened or cut to allow Marie's voice to rest.