It fills the clubs with dancers, but it fills some rock fans with queasiness. It's made to get you dancing, or at least bobbing your head.

The sound goes by techno, dubstep, house or other names, but it all fits under the umbrella of electronic dance music, which is generally any music with electronic or synthesized sounds used in a club to get people to dance.

That's a broad definition, but like rock 'n' roll, it needs to fit hundreds of styles and elements. Electronic music is always made by a DJ or a record producer, whether he or she uses drum machines and synthesizers, turntables and vinyl records or a laptop full of digitized beats and songs.

Not for you? Well, EDM, as it's commonly called, has invaded almost everything. You may not realize it, but a lot of Lady Gaga and Katy Perry songs are full of electroclash and other styles of EDM.