Mildred Gillars ("Axis Sally") was an American who broadcast pro-Nazi propaganda from Berlin throughout the war. Her show, aimed at American GIs, mixed popular American music with demoralizing messages about unfaithful wives and girlfriends back home, and the futility of fighting. Before D-Day, she broadcast a play called "Vision of Invasion" depicting the slaughter of American troops on the beaches.
"Tokyo Rose" was not one person but a collective name given by Allied troops to English-speaking Japanese female broadcasters. The most famous, Iva Toguri d'Aquino, was an American citizen stranded in Japan who was pressured into broadcasting. Her program, "Zero Hour," similarly mixed American music with propaganda aimed at Pacific theater troops.
Ironically, most troops enjoyed the broadcasts for the music rather than being demoralized by the propaganda, which they found laughable. After the war, Gillars was convicted of treason and served 12 years in prison. Toguri was also convicted but was pardoned by President Ford in 1977 after evidence emerged that she had been railroaded and had actually tried to aid Allied POWs.