Pippa Middleton: Planning Sister Kate's 30th Birthday Party?

Pippa Middleton shows off her fabulous fashion as she heads to work on Thursday (January 5) and Friday (January 6) in London, England.

The 28-year-old younger sister of Catherine, Duchess of Cambridge, is reportedly planning her royal sister’s 30th birthday party!

PHOTOS: Check out the latest pics of Pippa Middleton

Pippa and Kate‘s brother-in-law, Prince Harry, are planning an 80s birthday party complete with karaoke, according to the Daily Mail.

Kate turns the big 3-0 on Monday (January 9).

10+ pictures inside of Pippa Middleton on her way to work…