Britney Spears is back on the horse. Her new comeback single, “Gimme More”, debuted on the website of NYC’s Z100 today.

And, while supplies last — or at least until the Z100.com crew figures out how to mask a URL — you can download the MP3 track by right-clicking here.

Really amazing that by this point, a major media channel would leave a track with such built-in popularity exposed to mass download. It’s not the most pristine recording — only 160kbps — but hey, it’s decent. And free.

As for the track itself? It’s alright. I rather like that “It’s Britney, bitch” opening. But it’s a bit overproduced for me, doubtless the influence of Timbaland protege Danja. It’s still Britney, but not as infectious as her past efforts. I’ll keep a lookout for the forthcoming dance remixes, hopefully on iTunes.