A demo for "Hold It Against Me," the first single from Britney Spears' new album, was leaked on the internet late last week. Brit's camp had originally intended to release the song on 1/1/11 (wishful thinking for a no. 1 single, perhaps?), but because of the leak, sent out the official version to radio stations on the 10th:

The single will be available on iTunes and everywhere else as originally scheduled on 1/1/11.