Daddy’s mini-me!

Nick Lachey and his bright, blue-eyed lil’ lookalike – 5-month-old son Camden – are featured on Lachey’s first-ever lullaby album, A Father’s Lullaby, which will be available to download on iTunes March 13, and released in stores in April.

The new dad tweeted, “So excited for you all to hear my new album ‘A Father’s Lullaby.’ Camden is the best muse a father could ask for!”

“When I first learned that I was going to be a father, I was inspired to create a special tribute to my son,” Lachey said in a release.

He added: “Music has always been an incredibly significant part of my life and a meaningful way in which I express myself. Creating this album allowed me to further connect with Camden while also sharing the experience with families who are on a similar journey of welcoming a new life into their world.”

The album features 12 songs, four of which are original tracks that Lachey co-wrote, including Father’s Lullaby, a loving tribute to his own father John and to his little boy.

The duo will have plenty of one-on-one time later this year. The family – including wife Vanessa Lachey – plans to hit the road in May for 98 Degrees‘s first tour in over a decade.

“Camden will be on tour for sure,” Lachey said. “I’m not going to spend 2½ months away from my son. That would be tragic.”