Liam Neeson ended his brief romance with Pamela Anderson after what sources tell RadarOnline.com was an "impossible to overcome" barrier rooted in his long-standing grief over the death of his wife, Natasha Richardson .

The pair was romantically linked earlier this year after starring together in The Naked Gun , with Anderson, 58, confirming their relationship lasted for a "short while" after filming on the comedy reboot wrapped. Article continues below advertisement

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The former Baywatch pin-up said about her fling with grizzled 73-year-old Neeson: "If you must know, Liam and I were romantically involved for a short

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