In a large bowl combine cut-up apples and/or pears with the orange juice and lemon juice; toss gently to prevent fruit from discoloring. Add remaining fruit, the sugar, and shredded orange peel, if using; toss again. Cover and refrigerate fruit mixture for at least 1 hour or up to 2 hours.
Just before serving, stir in chilled champagne. If desired, sprinkle with almonds and garnish with geranium leaves and marigolds. Makes 12 servings.
Up to 2 hours ahead, prepare fruit mixture. Cover and chill. To serve, add champagne and garnish as directed.