wasn’t just the dark brown wig, army hat and knee-high boots and drew attention to Paris Hilton when she stepped into L.A. hot spot Hyde on September 7. When the heiress, who had been arrested for DUI the night before, spied newly single Travis Barker at the bar, she ran up to him and smooched him on the lips.

“People were shocked and stared,” a clubgoer says. “They looked like a full-on couple. They kept sneaking in little kisses. He had a smile on his face that went from ear to ear.”

Not so amused? Barker’s estranged wife and Meet the Barkers costar, Shanna Moakler, who once considered Hilton a friend and has been separated from the former Blink 182 drummer since August 8 (when he filed for divorce).

“For Travis to go with her is like a double whammy,” Moakler, 31, tells Us. “I feel like it was done out of spite. I don’t think he could’ve been more hurtful.”

Through his rep, Barker denies that Hilton is more than a friend. And Hilton told MSNBC's The Scoop last week that it was a case of mistaken identity, saying, "I did not make out with Travis Barker. I was with his friend Alex, who I met that night. It's nothing serious. He looks like Travis, he has tattoos all over his arms, and he has a mohawk. People must have confused him with Travis."

However, the Barker and Hilton sightings continue. The two were spotted making out Monday night at Butter and hit the NYC club Marquee together the following night, where TMZ caught them locking lips on video.

What incriminating evidence did Moakler uncover through email and text messages? What’s the latest in the Barkers’ divorce proceedings? What are the estranged couple going to do about the tattoos they got in honor of each other? (Barker has a the tattoo of Moakler on his neck and she has his name inked on her wrist and his initials on the back of her neck.) For more details on Travis and Paris’ new romance and the Barkers’ break-up, check out the current issue of Us Weekly, on newsstands this week.

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