Please Don't Go Alone (Mike Posner vs. Calvin Harris) by MashMaticians Just got this one dropped off on the crunkbook wall. Pretty nice mash by the MashMaticians. Please Don't Go Alone (Mike Posner vs. Calvin Harris) by MashMaticians TIL SUNDAY! 20% OFF Regular Items & FREE SHIPPING, no minimum order! Shop Karmaloop.com NOW Posted on December 30, 2010 by DJ Real Juicy and filed under Dance Tunes and tagged calvin harris Mashup mike posner please don't go The MashMaticians.