Lachey (left) and Simpson Photo by: tsuni / gamma

Jessica Simpson and Nick Lachey felt some sadness when their divorce was finalized June 30, say friends of the former Newlyweds. Still, a source close to Simpson tells PEOPLE, "Both of them have moved on."

Indeed. As PEOPLE reports in its new issue, Lachey, 32, spent the early morning hours of July 4 at Manhattan's Butter nighclub kissing, cuddling – and getting lap dances from – his new squeeze, Entertainment Tonight correspondent Vanessa Minnillo.

A few days earlier, on July 1, Simpson, 26, headed to Southampton's Pink Elephant club, where she spent almost an hour laughing in a private cabana with Scrubs star Zach Braff at a party for Kritik Clothing.

"Life goes on," Simpson's pal tells PEOPLE. "She's not going to be hiding."