Britney Spears's new single "Hold It Against Me" will be available for download at midnight on iTunes, but Ryan Seacrest debuted the tune this morning on his radio show! It's the long-anticipated first sound of what's to come from Britney's upcoming album to be released in March. We had a look at the cover art, which you loved, last week, now take a listen to the song and tell us what you think — love it or leave it?