The Medley system chooses 1/5 of any 5/7 of the dance crews. I went through all possible outcomes and here’s what I found;

The first fifth - The fastest you can get in the first part, is theoretically 33 seconds on Boogie Wonderland. You could do Spectronizer, but you’ll see why not later

The second/third/fourth fifth - The fastest I found to be possible on these parts, were 20 seconds (Baby one more time), 22 seconds (This is Halloween) and 23 seconds (Night Boat to Cairo). These can be in any order.

The final fifth - The fastest outro would be on Spectronizer, with 28 seconds. You couldn’t have Spectronizer here and at the beginning, as it chooses 5 different songs.

Final time? - The transition between songs takes 1 second, and adding the others would make the perfect run for Medley Crew be only 2 minutes and 12 seconds. Which is the same length as 66% of Barbra Streisand, or 77% of the current World Record. So we need to improve the WR by 23%!