Back in 2000, Nick Carter made People's Most Beautiful list. And the blonde, youthful Backstreet Boy certainly was a looker. But, in the years since, hard partying and unhealthy habits took their toll on Nick Carter.

He got a DUI, got into a bar brawl, topped the scales at 224, even -- ack! -- dated Paris Hilton. None of it was a wake-up call. Recently, however, the singer was diagnosed with cardiomyopathy. Finally, Carter had his wake-up call.

"Eating was just something I had to get under control," said Carter. He also quit drinking which was harming his health in more ways than one. Nick Carter lost 57 pounds and is in great shape again. (Just check out his six-pack right here ... yowza!) Carter said, "I feel really good and I feel really blessed in my life to have a second chance."

Watch this People video to see Carter discuss how he ditched the bad habits to improve his health.