Is Rihanna to blame for J.R. Smith's struggles during the Knicks/Pacers playoff series? Some Knicks fans out there think so. Rih-Rih and J.R. were spotted partying together after a Knicks win in Game 2 of the series last week and he hasn't been the same since.

So one Knicks fan in particular who goes by the name @peruvian_gawd took it upon himself to call Rihanna out for it on Instagram today. And, according to a screen grab that he posted to his own Instagram page a little while ago, Rihanna responded by going in on the Knicks and J.R.

Check the photo above. Yikes.

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[via Jocks and Stiletto Jill]