The pop stars will team up for a segment for Madonna's Sticky & Sweet tour

By Brian Orloff and K.C. Baker
Updated July 07, 2008 06:10 PM
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Britney Spears will team up with Madonna – virtually – during the singer’s upcoming Sticky & Sweet tour.

“Britney is going to film something for Madonna’s show in the next week or so,” Madonna’s rep, Liz Rosenberg, tells PEOPLE.

As for details about what they will be doing – and where it will be filmed – Rosenberg says, “I don’t know. It’s a secret.”

Contrary to published reports, Spears is not in New York to film the video segments, nor has she already shot anything.

This isn’t the first collaboration for the pop stars. The two famously teamed up during the 2003 MTV Video Music Awards, sharing the stage – and one memorable kiss – during the broadcast.

Spears is not expected to perform with Madonna, whose tour kicks off in Wales next month. The U.S. leg of her tour starts Oct. 4 in East Rutherford, N.J.