Mariah Carey Shows Off Secret Surgery Slim-Down

Mariah Carey showed off her new and improved look for 2018 — slimming down even while experts fear that she's wrecking her body!

Mariah and her boyfriend/manager Bryan Tanaka looked upbeat while having dinner at Mr. Chow in Beverly Hills — with insiders reporting that the pop diva was showing off a 40-lb. weight loss after undergoing gastric sleeve surgery. That's after hitting an estimated 200-plus pounds in mid-2017!

But Dr. Stuart Fischer — who hasn't treated Mariah — is concerned that she's damaging her health after having already shed 70 pounds after giving birth to twins in 2011. “Taking the weight off again, after piling on the pounds the way she has, will not erase the damage she’s already done,” he warned.

“Her weight gain” added Dr. Fischer, “put her at risk for 65 potential life-threatening illnesses!” Mariah still seemed carefree, even though she's also taking on a lawsuit filed by Brazilian concert promoters after canceled shows — and she's still getting used to having her boyfriend run her career.

Bryan still helped to start Mariah's year right — with The National ENQUIRER's own Rob Shuter reporting that he went straight to Ryan Seacrest for a guarantee on her triumphant return to ABC’s “New Year’s Rockin’ Eve” special. Ryan “personally vowed to make sure nothing would make Mariah uncomfortable,” said an insider.