The singer - rumoured to be pregnant - was performing to over 100,000 guests at the Formula 1 Singtel Singapore Grand Prix event yesterday.
In a YouTube clip, the 'Obsessed' star is seen singing her hit song 'Make It Happen' when she slips over in her stiletto heels.
Carey was then caught by one of her backing dancers as she told the crowd: "Hold up, I want someone to help me take these shoes off. I wasn't supposed to be wearing them!"
She then continued singing while ushering her assistant to come out on stage and help her remove the shoes.
Carey, who sang a string of her biggest hits at the event, including 'Dreamlover, 'My All' and 'Hero', recently said that she will announce her pregnancy "when the time is right".
