The classic Sidecar gets the Royale treatment. While any sparkling wine can be used, Champagne is a natural accompaniment for a drink made with two French ingredients.
Brandy is a class of spirits distilled from grape wine, grape pomace, and the fermented mash of other fruits. Most brandies made from grapes and apples are aged in barrels, while pomace and fruit brandies are clear, un-aged spirits. The most famous of the pomace brandies are Italy's Grappa and France's Marc, while the most familiar grape brandies are Cognac, Armagnac, Brandy de Jerez, and Pisco (un-aged).