But incase you guys want to be illegal and download the song early.
Here you go: dc316.4shared.com/img/486908291/7ec6f905/dlink__2Fdownload_2FiQPcwuq-_3Ftsid_3D20110121-21651-63f82a30/preview.mp3

If you need help saving, just comment.

Otherwise, there you are. Enjoy, until March 29th! 
Well. Legally. You can hear/download the song on February 1st.