Katy Perry offered to write a campaign theme song for Hillary Clinton after meeting the politician at a book signing in a Los Angeles Barnes & Noble. Perry was there to get her copy of Hard Choices signed, Clinton’s new book about her time as Secretary of State. Though Clinton has not yet made a statement about whether or not she will run for president, Perry offered her services, just in case. The pop star tweeted: “I told hillaryclinton that I would write her a “theme” song if she needs it…” to which Clinton replied, “Well that’s not a Hard Choice. You already did! Keep letting us hear you Roar.”