So that's why one of my rules of parody writing is that it's gotta be funny regardless of whether you know the source material. It has to work on its own merit.
It's hard to really articulate what the parameters are that make one song parody-able and another song not, but if I can come up with a good enough idea for it, I go for it, and if not, then I have to move on.
I'm an ugly girl, My face makes you hurl, Sad I have it, I should bag it. Acne everywhere, Unwanted facial hair. I'm a relation to Frankenstein's creation.
I don't want to pooh-pooh modern pop. I appreciate that as well, but my personal favorite kind of music is guitar-based rock. I like grunge and garage bands and alternative music, but that's more my personal taste.