mashup

Mashups are a powerful thing, and this one of 'Enter Sandman' and 'Hip To Be Square' sounds like next pop-hit. Source: <a href="https://digg.com/video/metallicas-enter-sandman-gets-turned-into-a-bop-with-this-hip-to-be-square-mashup">Digg</a>

You know a mashup is good if you start to forget the original tune of the songs. Source: YouTube

Unfortunately, this video is fan-made and probably won't become an actual game, but this Star-Wars-themed Mario Kart race is making fans everywhere wish it was real.

A guy named DJ Cummerbund just released a mashup of Adele's Hello with Nirvana's Smells Like Teen Spirit...which shouldn't even have a chance of working, but he pulled it off.

There's a mash-up on YouTube of SIX different hit country songs that sound so similar it's hard to tell when one ends and the other begins.