Stop everything!
That's the exact thing that went through my mind when I first heard Katy Perry's "I Kissed a Girl".  Granted, I was driving so there's only so much stopping I could really do without a red light.  
But yea.. I don't really know what to say considering how there are many songs out there about partying, kissing, sex.. and in heterosexual minds we never really think whether it's a boy or girl but simply by default would conjure an image of our attraction.  So now there is a song without a doubt of a girl singing about another girl.  Interesting.  Not making a judgement whether bad or good.  Just interesting. I'm sure the guys love this song.  :)  After all, it's like inherent for most boys nowadays to picture threesomes.  Sign of the times, I guess.  Although apparently in the 90s someone else wrote a song like this.
Anyway, at the end of all pondering, it doesn't really matter what deep nonsense come up in my head.  It's a catchy tune.  And I'm sure it's getting the singer some attention.  
http://www.spinner.com/2008/06/25/rockin-gay-moments-katy-perry/