The pop star sent fans into a meltdown over this footage of her signing autographs on stage at the AHF World AIDS Day Concert in Los Angeles last Thursday:
It initially appeared as if Carey was attending to fans while sitting on a stool. But when she stood, the furniture was nowhere to be seen. Fans speculated about how Carey managed to balance so comfortably. Some suggested it was down to her core strength while others believed her dress gave her support.
The majority, however, were convinced she was using an invisible chair: