MEAN GIRLS?

It's downright childish. But is it true? Did Heather Locklear recently park outside Denise Richards's Westlake Village house and blast Bon Jovi's "Livin' on a Prayer"? Locklear has stopped speaking to Richards after finding out that she is dating her estranged husband, Bon Jovi's Richie Sambora. But a Locklear pal denies she pulled any Hollywood-turned-high-school hijinks: "It 100 percent never, ever happened." Counters a Richards pal: "It is 100 percent true." (Math, Hollywood style.)

Meanwhile, Locklear, 44, joined friends, including David Spade, for dinner at L.A. hot spot Republic May 20. That same night Richards, 35-who is now seeking a cut of Charlie Sheen's Screen Actors Guild pension in addition to sole custody of their two kids-watched from backstage as Sambora, 46, rocked out in Dublin. The two then hopped a private jet and checked into a five-star hotel south of Naples. Who needs drive-by serenades? They can make their own music.

PHOTO (COLOR): POSITANO, ITALY, MAY 22 That's amore ! Richards and Sambora are sunny and warm during their Italian sojourn.

PHOTO (COLOR): L.A., MAY 20 Despite romance rumors-and breakup reports-sources tell Scoop that Spade and Locklear are still just friends.

PHOTO (COLOR)

~~~~~~~~

Scoop Contributors Olivia Abel; Rennie Dyball; Beth Perry; Charlotte Triggs; Marisa Wong; Bryan Alexander; Shannon Bradley; Alexis Chiu; Caris Davis; Michael Fleeman; Mary Green; Lisa Ingrassia; Julie Jordan; Amy Keith; Ken Lee; Tiffany McGee; Gail Nussbaum; Simon Perry; Brooke Bizzell Stachyra and Praxilla Trabattoni