Simpson, Lachey officially single!

Newly single Nick Lachey insists it's time to for him to move on now he is officially divorced from Jessica Simpson.

Their divorce was finalized on Friday after three years of marriage. Papers filed in Los Angeles Superior Court show Lachey and Simpson "are restored to the status of single, unmarried persons."

Lachey appeared on the Today show Monday, and performed a live concert in Manhattan, New York City's Rockefeller Plaza.

He was promoting his new album "What's Left Of Me" and some female fans in the audience held up signs reading, "Nick, we want what's left of you!"

The 32-year-old told interviewer Lester Holt, "I'm doing well. It's a process we all have to go though. This week was the final step in that process."

When Holt asked what it was like to put such a public relationship behind him, Lachey replied, "It's a huge part of my life. But for me personally and professionally, it's time to move on."

Simpson, 25, and Lachey, 32, announced in November that they were separating.

"After three years of marriage, and careful thought and consideration, we have decided to part ways," the couple said in a statement issued by their publicists. "This is the mutual decision of two people with an enormous amount of respect and admiration for each other. We hope that you respect our privacy during this difficult time."

The couple married in October 2002. They were featured from 2003-2005 in the MTV reality series "Newlyweds: Nick & Jessica."