I don't trust people who don't like mash ups. I remember working with a guy who was a "musician" (I believe that was the term he used) when I lived in Canada who told me that as a "musician" (there's that word again) he couldn't get behind mash ups. He said it was because it didn't sound right to throw two songs together, something about key changes, pitch, him being a snob etc etc etc. Look I'm sure there are genuine reasons why mash ups are musically unsound but honestly, take a listen to this beauty:
Now as far as I can see grafting two very modern pop gems on to a bunch of thumping dance hits can only ever be a good thing. A bit of Shakira is always amazing, a bit of Lady Gaga is always fun, throw in a Madonna beat, a bit of Pitbull (who has perfected the art of the trashy club pop tune) and a snippet of David Guetta and how can you go wrong?
I may not be a "musician" (truth be told, I just like putting quote marks on things, no disrespect to any musicians intended) but I can't help but this not only makes the case for mashups, it also makes the case for Shakira and Lady Gaga teaming up for some kind of world conquering pop superduo. Like Salt 'N' Pepa with the rapping swapped with leotards. I think it would work well for everyone.