Preheat oven to 350 degrees Fahrenheit.
Spray a 13x9-inch baking pan with nonstick cooking spray. Set aside.
In a large bowl, beat cake mix, champagne, vegetable oil and egg whites at medium speed with a mixer until smooth.
Pour batter into prepared pan.
Bake for 15 to 20 minutes, or until a toothpick inserted in center comes out clean.
Cool in pan for about 30 minutes, or until cool enough to handle.
Using your hands, crumble the cake into a large bowl.
Add frosting and work it into the cake crumbs with your hands until it forms a ball.
Roll dough into 1-inch balls and place them on a baking sheet lined with parchment paper.
Melt a small amount of white chocolate chips in 30-second intervals.
Dip cake pop sticks into melted chocolate and then push them into the cake pops. Freeze for 1 hour.
Melt remaining white chocolate chips. Roll each cake pop in melted chocolate, allowing excess to drip off.
Add sprinkles and stars quickly before chocolate hardens. Chill before serving.