Okay, check this out:
http://soundcloud.com/skrillex/avicii-levels-skrillex-remix
Some of those vocals fx are very familiar. I swear I heard those somewhere on the Steinberg website. Content sets or Loopmash? Anyone know? It’s gonna kill me until I find out. 
As far as I know he’s doing everything in Ableton, at least that’s what he said in an interview some time ago.
He’s a brilliant producer and sound designer, so it’s hard to tell.
Yeah, he has 205,000+ soundcloud followers: that’s 10x the member count of this forum! If I find out where I heard these, I’ll let you guys know. Must not have been here. 
Don’t accuse me of making something up just so I could start a lounge topic about Skrillex! 