Exploding into the top spot at the box office this Memorial Day weekend was Buena Vistas PEARL HARBOR, which made a triumphant nationwide debut, grossing $75.1 million. The 3-hour, action-packed movie is set during the time of the Japanese bombing of Pearl Harbor, where two friends (Ben Affleck and Josh Hartnett) are caught up in the events that draw the United States into World War II. DreamWorks' CG-animated film SHREK more than withstood the heavy bombardment, slipping down one notch from first to second with $54.2 million during its second weekend. Universal's THE MUMMY RETURNS remained at #3 for its fourth weekend with $19.1 million. Sony's A KNIGHT'S TALE lanced the fourth slot with $9.3 million. Warner Bros. ANGEL EYES came in #5 with $6.2 million. Miramax's BRIDGET JONES'S DIARY moved to the sixth slot with $4.0 million. Warner Bros. DRIVEN fell from seventh to tenth, grossing $1,2 million. Box office figures were obtained at Yahoo.com. Directed by Andrew Adamson and Victoria Jenson, SHREK stars Mike Myers, Eddie Murphy, Cameron Diaz and John Lithgow. It was produced at PDI/DreamWorks, the companys Palo Alto CGI and effects unit. SHREK was one of 22 films selected for official competition at the 2001 Cannes Film Festival. It was the first time in 48 years that an animated film has been selected to compete at Cannes.