I don't think Woo Hoo itself is an incredible song, but the transfer from party music to music with an ACTUAL MESSAGE was monumental and, in my opinion, is going to be necessary in order for Ke$ha to achieve artistic growth in the eyes of the general public and to see a type of success that isn't thanks to how generic the material is.
If Die Young was released just a little bit earlier before Diamonds and whatever the Bruno song that was released at that time was called were released it would have been perfect