Canadian synth-popper Claire Boucher, better known as Grimes, has given away a brand new tune today, 'Go'.
As xlr8r have pointed out, the track was produced with Skrillex's pal Blood Diamonds and was was originally written for Rihanna, though was perhaps a little too dubsteppy for the pop star's liking. It's certainly more EDM-inflected than anything found on Boucher's hugely successful 2012 debut, 'Visions'.
Grimes is currently busy working on her sophomore LP (dropping in Sepetember) however is apparently "very bored" of waiting to finish it, hence the emergence of 'Go', which you can stream below. Only time will tell if her new direction sounds similar.