Vice President Joe BidenJoe BidenThe Hill's 12:30 Report Biden rips Trump transgender ban: Every qualified American should be allowed to serve Clinton book to double down on Russia, Comey message MORE took a selfie with pop singer Katy Perry at the White House Tuesday ahead of her concert at Washington, D.C.’s Verizon Center.

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She posted the photo on her Instagram account and said Biden made her call her 93-year-old grandma to thank her for her blue eyes.

Their meeting comes just days after Perry met another possible 2016 presidential hopeful, Hillary ClintonHillary Rodham ClintonHouse Intelligence Republican: Claims Gowdy acted as second lawyer for Kushner 'horses---t' GOP Senate candidate: concerns about Trump are 'coming to fruition' GOP senator on Trump's attacks: Sessions 'deserves better' MORE.

Perry posted a photo with Clinton on her Instagram, and said she offered to write a 2016 campaign theme song if Clinton runs for president.

Clinton eventually responded on Twitter and suggested that Perry already wrote her one—“Roar.”