Nick Carter has revealed his newborn child is "doing much better" after hospital treatment, and the family have returned home "safe and sound".The Backstreet Boys star and his wife Lauren Kitt welcomed their third child last week, but some "minor complications" meant they were forced to stay in the hospital for a few days. Revealing that all was now fine, the 41-year-old tweeted on Monday: "Ok everyone, I wanted to let you know that finally, we are home safe and sound.