Britney Spears - Joining Madonna at the Superbowl?!

Madonna was just quoted saying that a "very exciting guest" will be joining her at the Superbowl!  The obvious choice would be Nicki Minaj or MIA due to their appearance on Madonna's first single, "Give Me All Your Luvin'", but I think it's Britney!  Britney is going to be the queen of features in 2012.  This rumor had to happen sometime.