When Mother Teresa died she went to heaven. St Peter was there to great her. He explained how they were expecting her and that they had a wonderful spot picked out for her.

As they walked along she noticed Princess Di off in the near distance wearing a halo. Mother Teresa paused for a moment and said to St. Peter,
"I don't mean to sound ungrateful or catty, but I spent my whole life devoted to the poor and sick."
"I spent years mired in unspeakable filth and squalor to help those poor wretched souls."
"What did Priness Di ever do to merit a halo?"

St. Peter leaned over to Mother Teresa and said,
"Actually, It's not a halo, it's a steering wheel!"