The fund was created to help in the relief and recovery effort in Japan, which was devastated by an earthquake and tsunami March 11.
"I've been inspired by Japan for many years and have a true love, appreciation and respect for the Japanese people and their culture," Stefani said in a statement issued through her record label. "The disaster in Japan is beyond heartbreaking and I want to do anything I can to help. I would never be able to make a gesture like this without the love and support of all the fans over all these years."
Swim Week Miami Beach 2014 [PHOTOS]