To answer the question honestly, it is Flagpole Sitta. That song is in my top 10. For a LONG time in high school it was my favorite song period.
To pick one that wasn't mentioned. Come On Eileen:
But my favorite is the remake of Come On Eileen by Save Ferris, which became a One Hit Wonder for them.
But I am a huge ska fan. So anything with even a little ska spin makes me happy.