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Britney Spears and Justin Timberlake performing with Madonna!!!??

Just the thought makes our head spin - but this amazing event could actually be taking place.

Ryan Seacrest told his listeners on KIIS-FM that Brit and JT will be joining Madonna on stage at her concert tomorrow night at Dodger Stadium.

It would be the first time Britney has been seen with her ex Justin in years. It would also be the first time Britney has appeared on stage with Madonna since their infamous kiss at the VMA's in 2003...

Is it true? We're just going to have to wait to find out!!!