AceShowbiz -

Mariah Carey stunned onlookers when she flaunted a slimmer figure at the TCL Chinese Theatre in Hollywood recently, and apparently she underwent gastric sleeve surgery last month following cruel criticism from body-shamers. The Grammy-winning singer got the surgery performed by a top surgeon in Beverly Hills, California, Page Six reported.

"Mariah underwent the procedure about a month ago," said a source of the star's recent gastric sleeve surgery. "She is already seeing some good results, and she feels a lot better."

The "Touch My Body" hitmaker reportedly decided to go under the knife after she became self-conscious and "extremely insecure" about her weight. In addition, the pop star's weight allegedly skyrocketed.

The procedure shrank the size of her stomach so that she would eat less and felt fuller more quickly.

"Mariah has always been proud of her curves, but this summer, as her Caesars Palace residency came to a close, and then she went on tour with Lionel Richie, she noticed it became harder to dance," the source claimed. "She was getting a lot more criticism online from body-shamers."

A source told Entertainment Tonight, "She always fluctuates and it makes her upset." The source added, "She lives in denial about it; she has the tags cut out of clothes, so she can be blissfully unaware of her size."

However, now that she's lost some weight, the "All I Want for Christmas Is You" singer reportedly felt "much better about herself." The source went on saying, "This is a new beginning for her."

Back in 2011, Mariah also experienced a significant weight loss. The girlfriend of Brian Tanaka dropped 70 pounds after giving birth to her twins, Max and Monroe, whom she shares with ex-husband Nick Cannon.