Nick is a part owner of a baseball team--the Tacoma Rainiers franchise, the Triple-A affiliate of the Seattle Mariners. 
As of November 2006, Nick is currently dating Vanessa Minnillo. They share the same birthday, November 9.
Nick participates in a high intensity 35 minutes aerobic spin class, four times a week.
Nick's favorite treat is the occasional chocolate KitKat.
Along with his brother Drew Lachey, he has a stepsister, Josie, a half brother, Issac, and two adopted siblings, Zac and Kaitlin.
Nick is close friends with actress Alyssa Milano and football star Matt Leinart.
Nick is a natural blonde.
Nick has revealed that he believes he saw the image of Marilyn Monroe in the lift of LA's Roosevelt Hotel. When he turned to get a closer look, the figure had vanished. Marilyn has long been rumored to haunt the celebrity hangout.
Nick wears both boxers and boxer-briefs.
Nick's favorite sport is football.
Nick's favorite Starbucks drink is a sugar-free vanilla latte.
Nick has appeared on the following lists:
2007 - one of the 'Sexiest Men Alive'
2005 - #1 position 'Sexiest Popstar'
2009 - Coming Up For Air
2006 - What's Left of Me
2003 - SoulO
Nick is a brother of fraternity Sigma Alpha Epsilon.
Nick was the lead singer of now-defunct band 98 Degrees. His brother Drew was also one of his co-members in the band.
Nick married pop-star Jessica Simpson on October 26, 2002 in a private ceremony in Dallas. There were close to 300 guests in attendance. The couple later announced their separation in November 2005. Their divorce then became finalized on June 30, 2006.
Nick's nickname is Slider Hollywood.
Nick is 5' 10" tall. He wears shoe sizes 10 to 10.5.