It's hard to believe that Nick Lachey and Vanessa Lachey have been parents for a full year. The 98 Degrees singer and the Dads star celebrated son Camden's first birthday on Thursday, Sept. 12. The party started a day early, with Drew Lachey and his wife gifting their nephew an assortment of cupcakes.

VIDEO: How Vanessa Lachey got her post-baby body in shape

Vanessa shared a picture of the sweet treats via Twitter on Wednesday, Sept. 11. "In Cincy for Cam's 1st Bday tomorrow," she captioned. "Talk about a #WelcomeHome! Thanks! Uncle @DrewLachey Aunt @LeaLachey1."

On Camden's actual birthday, Vanessa tweeted a picture of her son's adorable outfit. "Thank You ALL for Cam's 1st B-day wishes & Love! U guys are the BEST! Check out his onesie!" she wrote, referencing the "Made in Ohio" screen-print design. "It's true, haha!"

Nick also tweeted about the momentous occasion, writing, "Celebrating one year in the life of the most amazing little boy @VanessaLachey and I could have ever imagined!! Happy 1st birthday Camden!!"

Though Vanessa has already shed the 65 pounds she gained while pregnant with her firstborn, she recently cautioned other new moms to be patient about their own progress. "Don't put pressure on yourselves, moms," she said during an E! News interview. "You just had a human being, and you're beautiful, and when it happens, it happens, and you get back in those jeans and it's awesome!"