Adele + Madonna = Gayest Diva Match Up Ever

While she may always be the Material Girl, it's been many a year since Madonna was actually a girl. And yet it hasn't stopped the Queen of Pop from calling herself a "different kind of girl" ("Give Me All Your Luvin'"), a "Girl Gone Wild," or saying she knows "What It Feels Like for a Girl." "Who's That Girl " was 1987, yet Madge straining credulity with the term (and a cheerleader outfit) ever since.

So what do we make of Madonna's plans for a grown-up album of ballads, with help from the unchallenged reigning ballad diva Adele? Adele, 25, will lend an assist to Madonna, 55, who will in turn write a song for Adele's next record.

"They have met in London and plan a writing session to produce a track for each other's new albums," says a source close to Madonna.

We're dying to hear what they come up with. And Madonna, don't grow up too fast.