1. Go onto Youtube and type in 'sometimes britney spears' in the search box.

2. The video posted by 'BritneyTv' should be first, if not try and find that one. I don't think it would make too much of a difference if you went on a different video but the timing may be different.

3. After clicking on BritneyTv's video, watch for the first minute. Or you can skip to number 4!

4. At 1.17 it is a scene of Britney sitting down in front of a car, with 2 people either side. On the left there is a girl wearing shorts. At 1.17 watch her do up her zipper and laugh! :P

http://www.youtube.com/watch?v=eNgXcenGjTo