The 26-year-old singer, who is known for her quirky dressing sense, is even devouring the Duchess of Cambridge's sister new party planning book for tips, reported Daily Express.
"Gaga is obsessed with the royal family and especially with Pippa. She was so desperate to get her hands on Pippa's Celebrate book she had aides ship it to her via courier to Puerto Rico where she was performing earlier this week.
"She hopes it will help her throw better parties and teach her how to be more like a member of the royal family," a source said.
Gaga also hopes that her admiration for Middleton could turn into friendship.
"By reading the book Gaga hopes it will give them something to talk about should they ever meet up. She would love to get pally with Pippa. She's been intrigued by her since the Royal wedding," the source added.