Madonna week is in full swing! On Saturday she chatted with Jimmy Fallon (and taught him to dance) for a live Facebook Q&A with fans, then flew to Miami to storm the stage at Ultra Fest (which apparently really pissed off Deadmau5). Her new album MDNA drops today, and now one of its bonus tracks, packaged exclusively on copies sold at Walmart, leaked online. It's called "Birthday Song" and it features M.I.A., the decidedly non-Walmart friendly "terrorist" who flipped the bird onstage at the Super Bowl. Listen to the track at Stereogum.
It's a catchy and fun candy-pop tune, with Madge and M.I.A. hooting and hollering about their birthdays over a simple drum and bass pattern. Then Madonna asks for a birthday spanking. Oh la la. What do you think? Tell us below.