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 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 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.
Nick: (revealing he doesn't regret his marriage to Jessica Simpson) I think life is unexpected in a lot of ways. The best you can do is just roll with those punches and be the better person for it in the end.
Nick: (about former father-in-law Joe Simpson) I don't pretend to understand Joe. I don't know if he ever liked me. Was he an influence in our marriage? Absolutely. There were times when I wished he would just let go a little bit.
Nick: I was propositioned by a mother and a daughter back in 1997 when 98 Degrees were performing. In some places, the mother-daughter combination might be intriguing but not so much in Nebraska. It was kind of creepy.
Nick: ... I'd gladly retire and hang out with the kids and clean the house. I want to have a good life and great family, and from a professional standpoint I want to be successful, but it's not the most important thing at all.
Nick: (jokingly) I think she'd [Jessica] be the first to admit that she has ditsy moments, and it became evident very early on that it was going to be a major plotline on the show. But come on. She's not Anna Nicole Smith or anything.
Nick: (on song writing) There's a lot of reflection that goes on whenever I write a song - it's been a wild whirlwind last couple of years and there's a lot to talk about, and hopefully that's evident in the music.
Nick: I know it's a little hypocritical of me since I have three, but I've always enjoyed girls without tattoos.
Nick: If I ever get used to cameramen following me around and taking video footage of me, someone shoot me, please. It's not life as I want it. You get more used to them, but to say you forget they were there, that a lie. It's impossible. There's a guy there with a camera; how can you not notice that?
Nick: I don't feel the desire to jump back into any kinds of reality TV. The only thing I can see myself doing is some sort of The Amazing Race, challenge-driven thing.