Britney Spears and Christina Aguliera were building a barn. While putting up the inside wall, Britney noticed that Christina was tossing every other nail into the garbage can.©JOKEDEMO.COM

Britney asked Christina, "Why are you throwing those nails away?"©JOKEDEMO.COM

Christina said, "The pointed end is on the wrong end of the nail."©JOKEDEMO.COM

Britney said, "Well, don't throw those away, we can use those on the outside wall!"