I myself cannot stand the mainstream pop music that is always on the radio nowadays. Especially Lady Gaga, and other such artists who, in my opinion, put their image before their music. It annoys the hell out of me for sure, but I won't insult someone elses musical tastes.
Unfortunately, some of the more Satanic Black Metal bands also fall prey to doing that. The ones who always talk about "spreading the word of Satan" or other such malarkey.
The strange thing about Lady Gaga is that her music is good enough that she shouldn't have to rely on her gimmicks/image.