In a medium mixing bowl, combine flour, sugar, baking power, and salt. Set aside.
In a separate mixing bowl, combine beaten egg, champagne sour cream, orange juice, oil, and orange zest.
Add egg mixture to dry mixture and stir just until moistened (batter should be lumpy).
Pour batter into 8x4x2 inch bread pan that has been greased on the bottom and 1/2 inch up the sides.
Bake at 350 degrees for 50-55 minutes.