http://torrentfreak.com/avicii-and-other-djs-produce-hits-using-pirated-software-150223/ I don't usually advocate stealing music, but if you like Avicii or any of those visibly brilliant fellows, I suggest you refrain from buying their crap and, instead, send your $ to the software developers those idiots are stealing from. Arpeggiators and in-house sound designers are doing all the work anyway, so you'll be paying the guys who are actually responsible for the music...

Excerpt:
"With a net worth estimated at $60 million the Swede has plenty of cash to splash. Enough to buy an expensive Hollywood Hills mansion.
Interestingly, however, some of the tracks he made his millions with were produced with the help of pirated software.
In an interview with Future Music Magazine Avicii proudly shows his setup and the associated video reveals that he’s using a cracked version of Lennar Digital’s popular Sylenth1 plugin, which normally costs €139."
I'm sure he can rationalize this...