The princess and the queen of pop could be making music history once more.
Britney Spears is rumoured to be making an appearance on Madonna's new album.
An image of the sleeve has been leaked - pictured on Britney fansite BreatheHeavy.com - which suggests the pop princess will feature on Madge's track Girls Gone Wild, the lead song on her upcoming album.
However, it's not known whether the artwork is authentic and neither camp has commented on the speculation.
Britney, 30, and Madonna, 53, have worked together several times since they famously locked lips on stage at the VMAs in 2003.
The American Pie singer featured on Britney's song Me Against The Music and Britney joined her on stage in LA during her Sticky And Sweet tour in 2008.
Madonna's new LP MDNA will be released next month.
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