>> music festivals, there would always be this deejay tent. over the years, that tent kept getting bigger and bigger. ♪ >> the superstar deejays, diplo, david guetta, cascade, these guys are pulling in millions as hea headliners. ♪ >> hip-hop stars are becoming rock stars. deejays are becoming rock stars. the only people who aren't becoming rock stars are rock stars. >> pop. ♪ >> the idea of just standing there and staring at someone on stage is a 20th century idea. whereas in the 21st century it's more interactive, more about us as an organism. >> come on. >> clap your hands. >> chap your hands. clap your hands. clap your hands. >> in the 2000s, we saw an industry that seemed like it would never change.