There's nothing wrong with being sexy, but there's a big difference between a sexy person, and a *****. I think that njanjayrp is trying to say that western artists (not all, but the most of them) use sex and other vulgar stuff to gain a popularity and fame. That happens in Asia too, but not as much as in US.
(Just look at those pictures he posted, they may be the most popular western artists).
For an example, I can't compare any western artist to Ayumi Hamasaki. There are persons who have better voice than her, but nobody can beat her in terms of creativity and lyrics.
They just can't... gain success with that.