Lachey dated fellow pop star Jessica Simpson for four years, though they had a five month break up, they remained in contact. They started dating again in 2001 and married on October 26, 2002. MTV featured the couple in the reality series "Newlyweds:

Lachey dated fellow pop star Jessica Simpson for four years, though they had a five month break up, they remained in contact. They started dating again in 2001 and married on October 26, 2002. MTV featured the couple in the reality series "Newlyweds: Nick and Jessica" for four seasons, beginning with their wedding day. Lachey and Simpson also starred in "The Nick and Jessica Variety Hour" and a Christmas special together on ABC.

Following months of rumors and tabloid speculation, Lachey and Simpson announced their separation in November 2005. Their divorce was finalized on June 30, 2006. He released "What's Left Of Me" following their divorce and former MTV VJ, Vanessa Minnillo, starred in the video of the single playing Simpson's part. Soon after, Lachey and Minnillo began dating. As of April 2007, the couple officially moved in together, purchasing an apartment in New York City's Atelier Condo Building, as well as sharing Lachey's home in Bel Air, California.

Lachey is