(CNN) Camila Cabello had a dark secret --- until yesterday.

In an interview with BBC Radio 1 host Greg James, she finally spilled the beans: she stole a pencil from Kensington Palace.

1's Teen Heroes -- selected for their "inspirational work and their dedication to helping others," The singer posed for a picture with the Duke and Duchess of Cambridge last month, along with this year's BBC Radio1's Teen Heroes -- selected for their "inspirational work and their dedication to helping others," the radio station said

But in her recent interview, she admitted she did more than smile for the camera.

"I'm sorry William, I'm sorry Kate," she said after admitting she took a pencil from the palace following a dare from James.

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