Mariah Carey fans are expressing concern over a viral video capturing her recent performance in Las Vegas, with some viewers questioning her well-being due to her slow and seemingly stiff movements on stage. The five-time Grammy winner is currently taking part in her Celebration of Mimi residency at Dolby Live, and the fan-shot Instagram video clip of her performance is receiving mixed reactions from fans, with some defending the 55-year-old singer, while others are suggesting she should take a much needed break. “She moves around like she’s an elderly woman,” commented one viewer, while another called Carey “stiff as a board,” as a worried fan wondered “Is she OK?” Despite the concerns, Carey still maintained her vocals and smile throughout the performance, which prompted an ongoing debate about our expectations of aging celebrities in the entertainment industry. The Celebration of Mimi residency continues with three more shows on February 12, 14, and 15. (People)