Katy Perry's Sexy Sexting.

You've been waiting to see Katy Perry topless every since the first time you heard "I Kissed a Girl." And while Katy has continually teased with massive amounts of luscious cleavage and even made a plaster cast of her bountiful bust, she has yet to deliver those D-cups in all their nude glory. At least to her fans.

One person who has seen Katy Perry's nude breasts is new boyfriend Russell Brand. And he even has photographic proof!

Page Six reports:

Russell Brand and Katy Perry are heating up. The womanizing actor, who first locked lips with the "I Kissed a Girl" singer at an MTV Video Music Awards after-party, recently texted her a love poem he wrote himself, according to a friend. "It was cute," our source says. "And the best part is that Katy responded by sending him a topless photo of herself." A rep for Perry didn't get back to us.

Under normal circumstances, this might be sad news, knowing that Russell possessed such a coveted image in his own private collection. But Russell Brand makes himself out to be a bad boy, this generation's Jack Nicholson. So you know that it's just a matter of time before Russell "accidentally" leaks that pic to the internet. Or a wily cell phone hacker takes care of it for him.

Follow Mr. Skin on Twitter. We promise there will be no personal topless pics.