Quoting xTJ:" I don't like either of their music as it's not really my thing or know too much about them as in the ... [snip!] ... and has been with 13 in 3 years? Do you feel this can happen in general or you think this is just a celebrity situation?"
I think it has a lot to do with their public behavior, how they choose to dress during performances, and what they sing about. Apparently, those things equal your personality when you're famous. haha
However... I think this happens all the time, celebrity or not.