A source told ET earlier this week that the mother of two has lost 25 pounds since undergoing weight loss surgery this fall. Carey got gastric sleeve surgery, which shrinks the size of the stomach so patients eat less, after feeling "extremely insecure about her weight," another source told ET in early November.
"She always fluctuates and it makes her upset," the source shared at the time. "She lives in denial about it; she has the tags cut out of clothes, so she can be blissfully unaware of her size."
The GRAMMY winner is expected to begin her All I Want for Christmas Is You Tour on Dec. 2.
See more of the singer in the video below.