Mix together the sparkling juice, lemon juice, sugar, and vanilla extract in a large pitcher.
Stir to combine.
Chill in the refrigerator for at least two hours before serving.
Serve chilled.
Interesting Facts
Mock-champagne is a great alternative to champagne for those who don't want to drink alcohol or for special occasions when you want to make a special drink without the alcohol.
It's also a great way to add a bit of sparkle to any party and it's easy to make ahead of time.
Mock-champagne is a great way to get the same bubbly effect as champagne without the alcohol.