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Kate Middleton's younger sister Pippa, 29, is busy promoting her new party book but ran into a blow-back from one of her younger fans.

"I hate princesses," an adorable blonde girl, whose face was decorated like a cat, told Pippa. "I like vampires."

The royal in-law, responded with a laugh as the kids continued their crafts, saying, "You really are a tomboy."

This outburst was during Pippa's book tour which started at a Fulham, London shop. Celebrate: A Year of British Festivities for Families and Friends is now available on Amazon.