You know what Jazz_Fan. upon thinking critically about this I have decided that you are incredibly wrong in your prediction. let me explain.
Ke$ha IS the new wave of GOOD pop music. yes you CAN say she's trashy and a little bit whorey, but for the most part MOST famous females geared TOWARDS teenages GO down that route and end up BECOMING one anyway. have you SEEN britney spears, lindsay lohan, etc.? Ke$ha IS evolution, she skipped the innocent persona and went straight to the end factor of ACTING trashy, drunken and drug addicted. not too mention her MUSIC is very catchy and she's HEADING the new wave of auto-tune.
another good thing about her is where CAN she take her career? it already APPEARS she is in the crapper because she LOOKS drug addicted and std infested, but in TRUTH the only way to go where she can SHOCK people (which is the fundamental in pop music popularity) is to BECOME a good girl. she's only going on the UPWARD spiral. after that happens all the parents who USED to forbid their kids from istening to it BECAUSE she WAS trashy will now LET their kids buy the album, and the OLD fans who didn't care that she WAS trashy will still buy her new albums and PRAISE her for "CHANGING" her life for the better.
if you LOOK at other huge pop stars LIKE lady gaga, they're just super weird and it's more weird appeal THAN catchy music. where is lady gaga going to go? get a sex change? that's a transition that will DRASTICALLY effect her fanbase and DAMAGE her populairty, whereas keshas FUTURE change will only have a positive outcome.