An Easter Egg is a common feature on DVD which are hidden and made to drive you nuts.

Okay. So on the main menu, go to Special Freatures, and then Behind The Scenes. Go down to where it says back to special features, and then click the "left" button on your DVD player's remote. The cursor, or a little star should be on what looks like a regular title: The larger text that says "Behind The Scenes." Press select and you will be viewing a segment about Nsync's entrance to the stage and time before the show. I enjoyed this bit, so I won't ruin it by saying anymore. Enjoy!