"I'm extremely, extremely happy for [Nick]," Jessica told Ryan Seacrest, in an interview on his KIIS-FM morning show on Thursday. "I don't know where all of those rumors came from.
"My mom actually called me and told me that everyone was saying that I was saddened and I was just in complete shock!" she added.
Although the former "Newlyweds" stars may not have enjoyed a fairytale ending with Lachey, the bubbly blonde said she "couldn't be more happy" for her former spouse and his new love.
"Our relationship was over a really long time ago so it would be nice if everybody could move on with us and really just celebrate the love between him and Vanessa – I do," Jessica told Ryan. "I wish them nothing but the best."
As for Jessica's love life, the Texas-born singer-actress-mogul said she's happy to be spending Thanksgiving on the East Coast with her new boyfriend, ex-NFL player Eric Johnson.
"My first New York Thanksgiving!," she told Ryan. "[Eric's] family is going to be with us on the float at the Macy's Day Parade, and my family will be there."
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