Pour 1/4 cup of the Grand Marnier into a shallow bowl, and put the sugar into a saucer. Dip the rims of 6 Champagne glasses first in the Grand Marnier, then into the sugar to form a crust.
Pour the remaining 1/4 cup Grand Marnier, the Champagne and orange juice into a large decorative pitcher and divide among the 6 prepared Champagne glasses. Serve immediately.
Recipe courtesy Emeril Lagasse, 2000