http://www.capsteps.com/

The Capital Steps are a musical parody group based out of DC that are the funniest live act I have seen in years. I saw them 10 days before the election in Oxford, Ohio(home of Miami Univeristy), a bastion of liberal elitists and they performed brilliantly, equally skewering both sides, much to the chagrin of the majority of the audience.

Examples of their songs are:

"Fakey Purple Heart" song to the tune of "achy breaky heart".

If you get a chance to see them it is an investment that will be wisely spent.