I’m pretty sure, you haven’t heard those tunes by rapper Watsky. According to Watsky, Aaron produced ’Headphones’ back in 2009 for his self-titled album ’Watsky’ and ’Hey, Asshole’ featuring Kate Nash for ’Cardboard Castles’ from 2013 which was also a single, check out all tunes including the Instrumental & the Official Video to ’Hey, Asshole’ and make sure to cop the tunes on iTunes.
Watsky - Hey, Asshole feat. Kate Nash (Official Video) (2013)