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Riff Raff Calls Sam Smith a 'Chubby Little F*ck Factory'

Most random celebrity beef ever?

After "Stay With Me" singer Sam Smith posted this Instagram picture of himself seated next to Katy Perry and Charli XCX at the MTV VMAs last Sunday with the caption, "So amazing to see my girl @charli_xcx last night!! Smashing it so hard," rapper Riff Raff responded via Twitter to the fact that he had been cut out of the original picture.

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Riff Raff -- perhaps best known for the being the supposed inspiration behind James Franco's memorable Spring Breakers character Alien-- was Perry's date to the VMAs, and is featured on the latest remix of her song "This Is How We Do."

Though it's baffling as to why Riff Raff was so upset about being cut out of the picture -- Smith did post a pic of him seated next to the Houston rapper, Katy and Charli XCX in an earlier post.

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Rising British singer, Smith, 22, also declared his love for Katy, writing, "I love you @katyperry."

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