From Rocklopedia Fakebandica
Fantastic Comics #14 (January 1941). Despite the fact that she's Spanish, she sings at Juan's Nite Club in Pernambuco, Brazil, where they speak Portugese. Musta been a big Francisco Franco fan.
She's in cahoots with Nazi spy Lieutenant Voss to kill American soldiers and steal plans n stuff. Yank Wilson, aka Q-4, the super-spy, catches her.
Her last name should probably be "Velez," but it was written by white people.