Def Jam's Justin Bieber has dropped a new single, "Yummy," the first salvo from his forthcoming album. Upon release, it immediately began zooming up the iTunes singles chart; it currently sits at #1. Check out the official video right here.

Biebs will debut a documentary series about his life and the creation of his forthcoming album. The 10-part series, Justin Bieber: Seasons, is set to bow on YouTube on 1/27 at midnight ET. You'll see talking heads Scooter Braun and Hailey Rhode Bieber, among others, in the trailer below. It's been reported that the series cost the online giant in the vicinity of $20m.

Biebs offered more tantalizing hints and a "special message" to fans on Dick Clark's New Year's Rockin' Eve on ABC.

The doc is produced by Bieber Time Films, SB Projects and OBB Pictures. Justin Bieber will serve as an executive producer. Braun, Allison Kaye and Scott serve as executive producers for SB Projects and Michael D. Ratner, Scott Ratner and Kfir Goldberg are executive producers for OBB Pictures.