Anna Kendrick: Katy Perry assaulted my boobs at the Grammys

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Apparently, Katy Perry has interesting ways of greeting her friends at formal events.

Anna Kendrick revealed on "Conan" that the pop star said hello to her at the Grammys ... by "finger banging" her "cleavage." No, we didn't make that up.

Watch Kenrick explain the encounter (complete with helpful hand motions!) as well as her dream come true (a.k.a. meeting Beyonce):

Photo/Video credit: TBS