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Pamela Anderson and Liam Neeson had fans eating up their flirty press tour, but behind the scenes, it was all a PR "bake-off" ... TMZ has learned.

Sources with direct knowledge tell TMZ ... the whole "Pam + Liam" love fest was cooked up by their PR teams and Paramount -- while "The Naked Gun" was still filming in Spring 2024. Getty

In fact, we're told Pamela and Liam didn't even see each other from the time cameras stopped rolling in June 2024 until the press tour launched more than a year later, in July 2025. Getty

A big slice of the stunt involved Pamela claiming she was baking muffins and sourdough bread for Liam -- something he even played along with in interviews leading up to the premiere. It makes us now assume that was also part of the strategy ... pure

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