"I, just like everyone else, have watched this terrible tragedy and feel so sorry for the children and the families who have lost so much," Duff said in a statement Monday. "I want to do everything I can to help those that have survived."
Duff, 17, will give the money to Kids With a Cause, which helps children who suffer from poverty, hunger, sickness, lack of education, abandonment, neglect and abuse. The "So Yesterday" singer and "A Cinderella Story" star will present the check to officials at the United Nations (search) in March.
Duff has 15 dates left on her "Most Wanted" tour.