Mario Unleashed: Band Performance
This video shows some sort of school performance of Mario, Luigi and a Princess Peach playing the xylophone and a Toad playing on the drums. These guys have gone all out, dressing up in costume, and having large Mario Themed props and powerups scattered around the stage.
They go through a lot of Mario songs, and in between each song they pull out stars, bouncing fireballs, super capes and turnips. They do an awesome awesome job, and the crowd goes wild.
If you liked this, you may also like a few other Musical Mario links:
Mario Theme on an 11 string Bass
Mario Theme on Trumpets
Nintendo Acapella - This last one is quite literally the first post I ever made on I'm a Human Inbox
Link (via Boing Boing)