Pippa Middleton has gained worldwide recognition for being the Duchess of Cambridge's sister, and to celebrate her 28th birthday, here are some of her best moments.

Kate Middleton's younger sister drew little attention until she showed up in that sleek Alexander McQueen dress at the royal wedding. Not only did the tabloids notice her perfect figure, but Kanye West even offered Pippa to model for his lingerie line.

Because her sister won the heart of England's presumed future king, she was also linked to Prince Harry in the past. Both denied the dating allegations, especially when Pippa was seen getting cozy with her cricketer and banker ex Alex Loudon just recently.

Although Kate was the one who nabbed a royal, Pippa is considered by some the "lucky" Middleton sister because of the unrestricted life she has yet to discover. Since Kate is already a duchess, each and every single one of her move, outfits and changes in her appearance will be noted by the media. Kate will be also obliged to attend every social or royal gathering with her future king and husband, alongside dealing with a hectic international schedule. Meanwhile, Pippa currently lives as an upper-class socialite, hanging around notable people, and personalities as much and anytime she wants.

There seems to be no sibling rivalry between Kate and Pippa. For one, Kate allowed her bridesmaid to almost outshine her on her wedding day with that dress, and it seems the duchess does not have any qualms about Pippa almost dating her husband's younger brother. Right now, Pippa is already an international icon, with her stunning looks and sunny personality making her one of the most sought-after socialites of today.

View the slideshow to see Pippa Middleton's best moments.

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