Vice President Joe BidenJoe BidenTrump complains of 'fake polls' after surveys show him trailing multiple Democratic candidates Biden pitches new subsidies, public option in health care plan The Hill's Morning Report - Presented by JUUL Labs - Trump attack on progressive Dems draws sharp rebuke 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 Diane Rodham ClintonTrump complains of 'fake polls' after surveys show him trailing multiple Democratic candidates Hillary Clinton responds to Trump tweets telling Dem lawmakers to 'go back' to their countries The Young Turks' Cenk Uygur: Here's how to choose a president 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.”