Pop icon Madonna revealed the artwork for her forthcoming album on Tuesday, posting the colorful cover on her Facebook page.  Titled "MDNA," the album will be Madonna's 12th, and is scheduled to arrive in stores March 26th.  The album's first single, "Gimme All Your Luvin," is scheduled to debut, along with the official video, on Friday.  Featuring M.I.A. and Nicki Minaj, Madonna will also perform the track, with her two R&B collaborators, at the halftime show of next Sunday's Super Bowl.  Check out the cover for "MDNA" below.