def super_stars
      return @super_stars if @super_stars

      girls = Precure.maho_girls.girls + Precure.a_la_mode.girls + Precure.hugtto.girls

      super_stars_date = Rubicure::Movie.find(:super_stars).started_date
      @super_stars = girls.select {|girl| girl.created_date && girl.created_date <= super_stars_date }

      @super_stars
    end
def super_stars
      return @super_stars if @super_stars

      girls = Precure.maho_girls.girls + Precure.a_la_mode.girls + Precure.hugtto.girls

      super_stars_date = Rubicure::Movie.find(:super_stars).started_date
      @super_stars = girls.select {|girl| girl.created_date && girl.created_date <= super_stars_date }

      @super_stars
    end
Get precure super stars

 @return [Array<Rubicure::Girl>] precure super stars

 @example
   Precure.super_stars.count
   #=> 12

   Precure.super_stars.map(&:precure_name)
   #=> ["キュアミラクル", "キュアマジカル", "キュアフェリーチェ", "キュアホイップ", "キュアカスタード", "キュアジェラート", "キュアマカロン", "キュアショコラ", "キュアパルフェ", "キュアエール", "キュアアンジュ", "キュアエトワール"]