A blonde, brunette, and firehead are waiting in front of the pearly gates when God comes out to greet them "Usually I wouldn't let any of you girls in, but I'm having a good day. I'll give you all a deal. If you can climb my 1000 stair staircase and listen to a joke at each step without laughing I'll let you in." They all agree.
The brunette loses at the 100th step. The red head loses at the 500th step. The blonde makes it to the 999th step and begins to laugh historically. God asks her "You were so close, why did you laugh?"
She replies "I just got the first one."