Pippa Middleton under 'Buckingham Palace vigilance'

Buckingham Palace is 'keeping an eye' on Kate Middleton's sister Pippa Middleton since she and her perky rear glided down the Royal Wedding.

According to the Daily Beast, as Britain anxiously waits for the Duchess of Cambridge to give birth, the Palace is facing a "Pippa Problem" and is monitoring her as she flits through high-profile social events, bachelors, and job titles, the New York Post reported.

Pippa was ordered by palace officials to lower her public profile just last week over fears that she was taking away the royal limelight.

Meanwhile, a royal watcher has told the publication that Pippa has done very well under the constant glare of the media, and has been very careful not to embarrass her sister or the royal family.

The source added that she is a young woman trying to find her way in the world.