A week after their St. Tropez trip, Jon Gosselin and 22-year-old party animal girlfriend Hailey Glassman have reunited.

The two spent Sunday in Harriman State Park, the second largest state park in New York.

According to onlookers, they were hugging each other and holding hands. At one point, Hailey grabbed a flower and put it behind Jon's ear. Jon, who was wearing his usual Ed Hardy duds, also pushed her on a swing.

Later, the two lunched at Rocco's Restaurant in NYC. They were spotted leaving with pizza boxes and doggy bags.

The two haven't been photographed together since their France vacation last weekend. Jon returned to the United States before Hailey to resume filming his TLC reality show.

On Saturday - the same day Jon was spotted moving items into his new Upper West Side bachelor pad - he met Kate and their eight kids for a photo shoot. Later that night, he dined with Star tabloid reporter Kate Major, but the dinner did not appear to be a date.

Jon flew solo on Sunday, chowing on a hot dog and chatting on his cell phone in Central Park. Kate is currently at their $1.1 million home in Pennsylvania with the kids.