Whoa baby, I just got back from a venture into the world of YouTube mashups and I have to give a warning.  This Command+D might take a little time.  So bookmark it (Command+D) and save it for a little later if you're not able to devote your full attention and your stereo system to it. The mashup or mash up or mash-up is not a new concept to most people.  You simply take two dissimilar songs and put them together.  Simple right?  Well, as anyone who's gone venturing into the YouTube mashup bins may realize, it's not that easy.  This list is some of the best of what Command+D found, though there are many many more out there. Enjoy! 1.   A Dancing Queen vs A Straight Up Thug From Queens 2.   East Coast vs West Coast vs The Man In Black 3.   The Authors Of The Previous Song vs The British Invasion 4.   The Current British Invaders vs The King Of YouTube 5.   The King Of Pop vs Helmets vs Brooklyn Dreads 6.   Dreads vs Headbangers 7.   Headbangers vs Curvacious Legumes (Steve might hate this one) 8.   Fellow Grammy-er vs Deaf Genius With An Attitude 9.   Other Guys With Attitude vs Grease Starlet 10. Fifteen Steps vs Five Steps (the best one on this list) Okay, so they didn't all flow from one into the other, but if you have a better transistion from one mashup into another, show me what's up in the comments!