I got the idea for this mash while listening to the radio and switch stations.  Jamn 94.5 was playing "Only Girl", and Hot 87.7 was playing "DJ Got Us Falling In Love".  I kept switching between the two stations because the sound was so similar and thought to myself "I have to mash these two songs."  And of course, I added a lot of other fully-constructed sounds to the mix, cause acapella-over-instrumental is just too lazy.

Instrumentals used:
Usher - DJ Got Us Falling In Love Again
Rihanna - Only Girl
The Cynic Project - Eurodance Megamix
Jay-Z - Change Clothes
DJ Splash - Always and Forever