A coworker of mine described Girl Talk's All Day as "a bubble mix" when I introduced it to him. It sounded a bit derisive, actually.
I've never heard that term before, and all Google was no help either: it yielded lots of recipes for making your own bubble mix — for blowing bubbles. The few music related links it turned up, were pieces of music that were named "Some song (bubble mix)", which indicates that it is a musical term, just not one I know.
So what is a bubble mix?