It’s hard to keep track of who has worn what, even when you are a star!

From the red carpet to the streets, Hollywood’s most sizzling celebrities can’t seem to avoid stepping out in identical designer duds as their peers. In this week’s Double Take Thursday, RadarOnline.com has photos of all the latest style twins!

The top British Bachlorette was radiant in red on Tuesday, and RadarOnline.com has photos of her stylish stroll to work.

Pippa Middleton, the 28-year-old sister of Kate, The Duchess of Cambridge, rocked her red Zara coat, that she wore in October, and a pair of French Connection jeans while carrying her trusty Modalu bag.

PHOTOS: Pippa Middleton In A Lady In Red

For all the fuss about her sister Pippa, Kate Middleton’s no slouch herself at stealing the show, and RadarOnline.com has the pics.

The Duchess of Cambridge displayed the elegance, class and beauty befitting of royalty Monday, looking nothing short of amazing in an emerald green dress she wore to a media reception held by Queen Elizabeth at Buckingham Palace.

Kate, 29, wowed the 350 in attendance with her Mulberry full pleated shirt dress, which retails for $2,200. The sexy garment was covered in peace signs, a fitting icon for Kate and her husband Prince William, who have spread their goodwill all over the world in their first year of marriage.

The Duchess of Cambridge was flying high on the fashion front on Thursday, boarding a plane to Canada in unusually expensive duds – and RadarOnline.com has all the details, as well as the price breakdown of her designer look.

Princess Kate, who usually rocks cheap and chic duds, showed off her famous figure in an RM by Roland Mouret Manon sheath dress (a favorite of Hollywood stars such as Penelope Cruz and Naomi Watts), which originally retailed for a staggering $1,555.

Kate Middleton's Style - See The Photos