Get the video on slow motion at the very end of the song during the time they say, 'Backstreet's back, alright!', you'll notice one of the female dancers to the right have difficulty getting back up with the rest of dancers and boys. She practically stood on her costume with her foot and the strap of her dress falls off. She struggles to pull it back up before they all jump back up to their feet at the end and barely succeeds.

This one is a bit hard to spot the first time but once you do, you get a chuckle all the time!