Wash, stem, quarter and freeze strawberries for at least 1 hour (can be done the day ahead). Run a wedge of lime around the rim of your champagne flute and dip in a plate of sugar to coat rim. Repeat until all glasses are prepared. Place 3 frozen strawberries in the bottom of each prepared flute. Open champagne and pour glasses approximately 2/3 of the way full. In a shaker filled with ice, combine tequila, limeade, and strawberry liquor. Shake. Add a squeeze of fresh lime if desired. Top each glass with the cocktail and serve immediately.