I don't usually like music that isn't heavy, but Rammstein are something else! I went to see them live in Birmingham a year ago and it was one of the best experiences of my life! They certainly are one of the best live acts around today.
Half-way through the show they went crowd surfing in an inflatable boat
Although they are German (and I don't understand a word of it) they are still fantastic and very catchy. Particularly songs such as "Feuer Frei!" and "Benzin".
Here is some pics of them live: