This has to be one of the more unique shirts I have seen in quite some time. This LED lighting shirt has a a sound activated LED bar on the front of the shirt that jump and flash in time with the music around you.
The shirt actually has a built in equaliser with a wide spectrum sensor controller to detect the real beat of the music rather than the ambient noise around you.
It is powered by 4 AAA batteries and has an adjustable controller to adjust the display for loud or softer music as necessary.
It can take quite a good bath in your sweat and the party sweat of other concert go-ers, but the display can simply peel off so you can give it a good wash after a wild night out.
Also check out these ones at Amazon.