Add tequila, triple sec, and frozen limeade to a blender.
Put ice in the blender until it is filled to the top with ice.
Blend for about one minute until all ice particles are gone and it has a slushy, frozen consistency. You may need to add more ice, if needed.
Enjoy!
Notes
Don't be afraid to over blend - that's how you will get a smooth frozen margarita texture. Make sure to blend the ice enough so the consistency is slushy and frozen rather than icy.
You can add frozen strawberries in syrup to make this into a Frozen Strawberry Margarita!