DIED: Robert Willis, 42, a Web site designer and the brother of "Die Hard" star Bruce Willis, died June 26 of pancreatic cancer. Recently it had been reported that Bruce, 46, had put his career on hold to care for his younger sibling and had bought Robert a home in Los Angeles . . . INJURED: R&B singer Lil' Mo, 23, whose "Superwoman Pt. 2" is No. 7 on the current singles chart, has canceled all public appearances and is resting at home after she was attacked with a bottle after a San Francisco concert on Friday. She required 20 stitches to her head, reports the L.A. Times. Her attacker has not been identified . . . RESCUED: "Felicity" TV star Keri Russell, 25, and Red Hot Chili Peppers singer Anthony Kiedis, 38, were caught in a riptide while swimming together in La Jolla, Calif., and required lifeguards to pull them to safety, said a spokesman for the San Diego County Lifeguard Service. Neither was injured.