Vice President Joe BidenJoseph (Joe) Robinette BidenBiden slams Trump over golf gif hitting Clinton Overnight Tech: Equifax hit by earlier undisclosed hack | Facebook takes heat over Russian ads | Alt-right Twitter rival may lose domain Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea 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 ClintonBiden slams Trump over golf gif hitting Clinton Overnight Cybersecurity: Equifax hit by earlier hack | What to know about Kaspersky controversy | Officials review EU-US privacy pact Overnight Tech: Equifax hit by earlier undisclosed hack | Facebook takes heat over Russian ads | Alt-right Twitter rival may lose domain 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.”