As the rumors continue to swirl about the nature of relationship with baseball star Alex Rodriguez, Madonna has announced that Britney Spears will tape a song that will air during the Material Girl's "Sticky & Sweet" tour.

Madonna's rep, Liz Rosenberg, confirmed the collaboration.

"Britney's segment film within the next week or so," she said. "Madonna specifically asked to work with Britney again."

NO GIRL-ON-GIRL REDUX: Madonna and Britney Spears are best remembered for the best kiss ever, but this time, the latter will only appear on video, unfortch.

So glad the stars â€" who famously "performed" at the MTV Video Music Awards in 2003 along with Christina Aguilera - will reunite, albeit virtually.

Good stuff. Taped is probably best, too. Madonna could have probably cajoled Britney Spears into performing live, but ... we all know she can't.