Nick Lachey thinks the arrival of his unborn daughter will be a "mind-blowing moment."

The 'Big Morning Buzz Live' presenter said: "We're expecting a little girl, beginning of next year. I get the best of both worlds: I get a son and now I'm going to have the experience of a little daughter, which will be a completely different, mind-blowing moment for dad. On a personal side, things could not be in a better place and I could not be more excited. It's great."

The former 98 Degrees singer thinks it's "crazy" how quickly his son is growing up.

He said: "He's growing like a weed and he seems like he's changing literally by the day.

"It's just a cool time. It's them finding their personality and really starting to get their vocabulary... talk in these full sentences and [you're like] 'Where did this come from?' It's just crazy."

Nick is currently working on finishing his upcoming album of covers, 'Soundtrack of My Life.'

He told UsMagazine.com: "The good thing about music is you can kind of do it whenever you find time to do it. This project actually started a few years ago... [I'm] thrilled that it's finally gonna come out on November 11. It's called 'Soundtrack of My Life' and it's a cover album -- it's all songs from movie soundtracks that were impactful to me and meaningful to me. That right song can bring out such a great moment in a film, and I really wanted to try to pay tribute to that through this album."