There are seven reasons.
Black and Paper recommends these cocktail recipes:
Mimosa
Champagne + Orange Juice
Bellini
Champagne + Peach Juice
Pomegranate Mimosa
Champagne + Pomegranate Juice
Lemonade Mimosa
Champagne + Lemonade
Sorbet Float
Champagne + Sorbet
Strawberry Bellini
Champagne + Strawberry
Sparkling Julep
Champagne + Mint + Tea Spoon of Sugar
Use Veuve Clicquot or a Sparkling Wine. Cheers!