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Anna Kendrick, Katy Perry

Kevin Mazur/Getty Images for Entertainment Industry Foundation

Katy Perry kissed a girl (and she liked it), but she really likes getting grabby with Anna Kendrick!

Fortunately, the Pitch Perfect star has no objections to Katy's playful advances! On Tuesday, Anna tweeted a picture of the pop star grabbing on to her boob, writing simply, "The girl can't help it."

This funny photo was actually taken Jan. 28 at the Hollywood Stands Up to Cancer event in Culver City, Calif.—just two days after Katy had another friendly encounter with Anna's breasts at the 2014 Grammys!

The Twilight alum wore a rather risqué Azzaro dress to the award show, and as she explained on TBS' Conan, she was "kind of asking for it" when "Katy Perry finger-banged my cleavage!"

"If nobody had done it I would have been a little sad," joked the Oscar-nominated actress.

"She's aggressive," Anna said. "I like it!"

How could she not? This week, though, Ms. Kendrick's been keeping her assets a bit more covered up as she hits up the tents in New York at Mercedes-Benz Fashion Week. She's been a front row fixture at multiple shows, including Carolina Herrera, Jill Stuart, Rebecca Minkoff, Kate Spade, Monique Lhuillier and Milly.

Maybe "finger-banging" will be in fashion, too, for Fall 2014!