Angelina Jolie and her brother James Haven will mark the first anniversary of their mother's death by making a donation to the Los Angeles hospital where she lost her battle with cancer.Marcheline Bertrand passed away at the Cedars-Sinai Medical Center on January 27 at age 56. Jolie and Haven plan to pay their respects to their beloved mother with a day-long vigil on Sunday to commemorate her life. The event will see Jolie take her four children to the hospital with her brother to hand over the money to the hospital's women's cancer research fund.But Haven is said to be concerned about how the star will cope with the emotional day. A close family friend says, "James and Angelina adored their mother. They want this day to be solely dedicated to her memory."(But) Angie still weeps for her a lot and James has been saying how he's worried she will fall apart on Sunday."Both children were close to their mother, but Jolie in particular had a hard time coming to terms with her mom's death and recently praised her boyfriend Brad Pitt for helping her through the trying time.