Madonna has reportedly asked Britney Spears to join her on tour, in a bid to help the troubled star resurrect her singing career.

The 'Material Girl' hitmaker is set to meet with Spears in New York on Sunday to record a video, which will be broadcast on big screens during her upcoming 'Sticky and Sweet' tour, due to kick off on August 23.

According to reports, the 49-year-old has even invited the 'Toxic' star to join her onstage at some of her world tour dates.

A source tells British newspaper The Sun: "They are recording a video together on Sunday that will provide the backdrop for part of Madonna's show.

"And they are talking about Britney taking the stage on a few of the dates too.

"It's hoped that Madonna can help Britney get back to her old self."

The singers previously stunned fans at the 2003 MTV Music Awards when they shared a passionate kiss onstage.