Since the network are rumors that Britney Spears did a duet with Madonna for her new album MDNA, and the site Flop Of The Pops, has published a picture of the front and back cover of this album.
You can see that the Girls Gone Wild song is a duet with Britney. So far just a rumor because the site says he does not know if the image is real or created by a fan of the singers.
If true the rumor, would be the second time Britney and Madonna collaborate together in a song. In 2003 Madonna Britney invited to participate in the song Me Against The Music, the first single from the album In The Zone by Spears.
