The star attended the Pier 1 Christmas Pop Up Storybook launch in SoHo Tuesday night and was "the ultimate professional," says a rep for the event. "She had fallen ill earlier in the day, but participated in the event last night as much as she could."
A rep for the singer tells PEOPLE that Carey "had been feeling under the weather with the flu over the past few days and was fighting it to the best of her abilities. She is doing well now and will be performing as scheduled this weekend. She thanks her lambs for the continued support and well wishes."
Mariah Carey is hooked up to IVs in a NYC hospital after falling severely ill early Wednesday morning ... TMZ has learned.
Mariah is getting pumped full of fluids and vitamins to fight off a nasty bout of the flu. We're told she was so dehydrated and ill ... her team made the call to get her emergency treatment.
She started feeling bad after an appearance at Pier 1 in NYC on Tuesday evening. There was extra concern about her health because she has a huge performance Saturday night at Hot 97's "Hot for the Holidays" concert in NJ.
We're told she's going to be fine, and could be released later today.
Better safe than sorry.
This is not the news anyone wants to hear, especially in this season. Get well soon Mimi!
Hope you feel better soon, legend!
Hope she gets better soon though. 
