Hard decision.
I'm not going to make a choice on which is my favorite. Because really, I have every song ever made available to the public on my itunes. I have the albums, and I know just about every word of every song. A lot of people say "Wow, I can get sexual too!" is their favorite, and while that's an amazing song, there are so many other great ones I feel need to be paid attention to.

Every song is absolutely addictive.