March 10, 2005 -- ACTION hero Bruce Willis (above) got some action of a different kind after the screening of his new blood-and-guts flick, "Hostage." At an after-after-party at the Peninsula Hotel early yesterday, Willis, who turns 50 this month, and teen queen Lindsay Lohan, 18, enjoyed a mutual gropefest. "At one point, Bruce had Lindsay's pants down far enough to reveal a tattoo that said 'La Bella Vista' (The Beautiful View) on her right cheek," says our spywitness. Eventually, Willis and a few friends, including Lohan, took the party upstairs to his suite.