Sugar Rim: Take a glass and rub a lime wedge around the top. Pour some sugar on a small plate and place the rim of the glass in the sugar, ensuring it becomes fully coated. Repeat with remaining glasses. Set aside. 

Blender: Place ice, frozen strawberries, fresh strawberries, lime juice, tequila, grand marnier, simple syrup, and orange juice in a high powered blender. Blend on HIGH (or use the smoothie setting) until the texture is smooth. Taste and adjust any flavor, as necessary, (to thicken add more frozen strawberries, to thin add more fresh strawberries, to sweeten add more simple syrup, etc.). You can also add more tequila, if you prefer. 

Serve: Pour into glasses and garnish each glass with either a slice of lime or a fresh strawberry.