• This weekend, Walmart is celebrating everyone’s birthday by giving away free cupcakes.     Just visit any Lowcountry Walmart Supercentre Sunday between noon and 4.     You can choose between a vanilla or a chocolate cupcake with either white buttercream or whipped icing, the same recipe as Walmart’s birthday cakes.     There’s no purchase necessary to get one of the free 3 million cupcakes Walmart expects to giveaway.