Feud Alert! Katy Perry Disses Beyonce's Duet With Shakira (VIDEO)

Oh, snap! Pop songstress Katy Perry says she wants her upcoming collaboration with bestie Rihanna to be "iconic," calling out Beyonce and Shakira for their underwhelming effort, "Beautiful Liar." Those are formibable opponents, Katy. Are you sure you want to go there?

Before you get too excited for a Katy-RiRi team-up, Katy warns that it may be a while before they top the charts together. The pair are taking their time with the tune in order to make it memorable.

Um, if it's you, Katy, teaming up with Rihanna, we think it'll be pretty memorable. 

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