How to make the best dance video?

Im doing the shake it up make your mark contest where you have to make a dance video and the top 6 go on tv and the veiwers at home decide who wins from there. So im asking how to make the best dance video to beat a bunch of preteens?the song choices for it are shake it up, break out, twist my hips and watch me. P.S. ONLY 45 SECONDS TO DANCE! :/ i really want to be in the top six.