my friend wants me to do a cake for her daughter's bday. her daughter loves the whipped icing from walmart. does anyone know what a similar recipe would be? thanks for your help =)

I would recommend this icing, it is light and delicious. I do add a stabilizer to the whipped cream, its called whip-it. The icing can be flavored with any extract besides vanilla if you wish.
http://www.cakecentral.com/cake_recipe-901-Whipped-Cream-Frosting.html