J. LO and Marc Anthony Renew Vows

Singers Marc Anthony, left, and Jennifer Lopez arrive for the amfAR Cinema Against AIDS benefit at the Hotel du Cap-Eden-Roc, during the 63rd Cannes international film festival, in Cap d'Antibes, southern France, Thursday, May 20, 2010. (AP Photo/Matt Sayles)

And they said it wouldn’t last!

For their sixth wedding anniversary, Jennifer Lopez, 40, and Marc Anthony – who renewed their vows in 2008 – are saying “I do” again at their new Hidden Hills, California, estate June 5.

“We realized the bets in Vegas [on whether we'd make it] stopped at five years, so we’re really looking forward to this one,” Anthony, 41, joked to Hot Stuff. “This is a big anniversary.”

And the fete will be a fine affair: “They even have a gift registry,” a source says.

Meanwhile, the couple brought their 2-year-old twins, Max and Emme, abroad when they visited France’s Cannes film festival. On May 20, Lopez and the kids were eating lunch at Hôtel du Cap Eden Roc when Max threw ketchup at her.

“It got in her hair and her face,” says an eyewitness, “but Jennifer kept her composure. She’s clearly a really good, patient parent.”