This episode of Let's Dance is GOLDEN.
Here's the deal:
The boys have to keep dancing to Shangri-La even when their other songs start playing. And if you know how hard these guys practice, you know that everything is muscle memory now and so the second they hear the other song their bodies will want to do the other dance LOL
So they try to sing over the other songs and its just a mess. They also have to switch fans in a certain order but I didn't really understand but its still hilarious!