I saw Super Mash Bros. live. I used to listen to them alot, but I've strayed away from mashups these days.

If I DO listen to a mashup, it's by Kap Slap (who btw, Den, was a Kappa Alpha at Lehigh):

Kap Slap - Guetta's Calling Solveig Up (Titanium x Hello x Pumped Up Kicks) - YouTube

Kap Slap - Chris Brown's Temper (Rihanna x Axwell & Dirty South x Temper Trap) - YouTube

Mashup - Kap Slap - Dubmau5 (Deadmau5 Dubstep Mashup) *[HQ]* - YouTube