Christopher Mercer is a Leeds producer convinced dubstep can be ecstatic as well as stoned-somber. "Woo Boost" was one hot example. This joint with Dirty Projectors main diva Amber Coffman — a pro-forma r&b come-on set to an awesome, gut-rumbling bass pulse — is another. And here's betting his work on M.I.A.'s new set will keep the beat engorged.

“Youth Knows No Pain”

“Like on 'Youth Knows No Pain' — we are the ones that should demonstrate, because we can take it,” Likke Li said. “We can pierce ourselves, take Ecstasy, dance all night and still go to work at our McDonald's jobs.” Despite the hedonistic sentiment in the song, the Swedish singer also admitted in hindsight her youth had repercussions. “I remember when I was 18-19 and feeling that I know it all,” Li said. “I always feel that I know it all. But that song is about realizing you don’t, and reflecting, ‘Boy, if I only knew what would follow.’”