I praised her because she did a better job at making radio-friendly pop music (or, as your prefer to call it, cashing in on the current trend) than most wannabe pop divas. It's a challenge to write something so catchy that people will forget they're singing the stupidest words ever put together into a sentence.
And Jeremy, what doesn't deserve praise are the thousands of MySpacers trying to cash in on the trends and failing. I'm not elevating Ke$ha to the same pedestal that some of my favorite bands, who write "honest" music, but I'm giving credit where credit is due.
Furthermore, I think there's plenty of bands on this site that get praise by cashing in on the "indie" trends or the "scene" trends (the Summer Set comes to mind quickly).