This is my all time favourite joke...
A couple were Christmas shopping. The shopping centre was packed , and as the wife walked through one of the malls she was surprised when she looked around to find that her husband was nowhere to be seen. She was quite upset because they had a lot to do and she became so worried that she called him on her mobile phone to ask him where he was.
In a quiet voice he said, "Do you remember the jewelers we went into about five years ago where you fell in love with that diamond necklace that we couldn't afford, and I told you that I would get it for you one day?"
The wife choked up and started to cry and said, "Yes, I do remember that shop."
He replied, "Well, I'm in the bar next door."