A family vacation for Mariah Carey, Nick Cannon and their newborn twins took a turn for the worse Wednesday when the 31-year-old rapper and actor suffered mild kidney failure.

"Please pray for Nick as he's fighting to recover from a mild kidney failure," Carey posted to Twitter, with a photo showing her lying next to Cannon in a hospital bed.

Little is known about what caused the medical condition, which occurs when the kidneys fail to adequately filter toxins and waste products from the blood. In a brief interview with People magazine, Mariah stated that while Nick is stable, he's still experiencing a lot of pain.

"We are hopeful that he'll be 100 percent as soon as possible," she told the site. "We really appreciate everybody's love and support."

Cannon is not only the host of "America's Got Talent" and a successful performer/singer, but also a philanthropic force. He was recently named to DoSomething.org's "Celebs Gone List" for 2011 — coming in ahead of other entertainers like Coldplay, Lea Michele, Taylor Swift and Miley Cyrus.

A recent Tweet reveals that he's being moved from a hospital in Aspen, Colo., to one in Los Angeles. "Currently being [transferred] to a hospital in LA. Thank you all for all your love, prayers and concern," he wrote. "You know me ... I will be a'ight."

According to the National Kidney Foundation, some 26 million Americans suffer from chronic kidney disease, with many more unaware that they're at risk. A simple test is available at the foundation website to help those who may be unsure.

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Nick Cannon recovering from kidney failure
Entertainer and husband to Mariah Carey currently being transferred to a hospital in Los Angeles.