• CAMDEN LACHEY photo | Nick Lachey

Credit: Andrew Southam

Published: Sunday September 01, 2013 06:00 AM EDT

2013

CAMDEN LACHEY

Smiles are all around for Nick and Vanessa Lachey (who pose with son Camden during a April 7 photo shoot in Los Angeles) as they celebrate their cheery baby boy's first birthday on Sept. 12. "I had a lot of expectations for what fatherhood would be because I thought about it for so long but when it happens, it blows your mind every day," the singer told PEOPLE about his role as a dad.