Leighton Meester: 100 Episodes Celebration

Leighton Meester was spotted at Cipriani Wall Street in New York City.

The "Country Strong" actress helped celebrate her hit show, "Gossip Girl's" 100th episode.

Leighton Meester: 100 Episodes Celebration

Leighton Meester was spotted at Cipriani Wall Street in New York City.

The "Country Strong" actress helped celebrate her hit show, "Gossip Girl's" 100th episode.

Leighton Meester's "Gossip Girl" Workday

Leighton Meester was spotted on set in New York City.

The actress joined co-star, Penn Badgley, while filming scenes for her hit show, "Gossip Girl".

Leighton Meester's "Gossip Girl" Workday

Leighton Meester was spotted on set in New York City.

The actress joined co-star, Penn Badgley, while filming scenes for her hit show, "Gossip Girl".

Leighton Meester: Roger Vivier Radiant

Leighton Meester was spotted at the Roger Vivier boutique in New York City.

The actress looked great while attending the Uptown-Downtwon Rendez-Vous cocktail party.

Leighton Meester: Roger Vivier Radiant

Leighton Meester was spotted at the Roger Vivier boutique in New York City.

The actress looked great while attending the Uptown-Downtwon Rendez-Vous cocktail party.

Leighton Meester: "Gossip Girl" Gorgeous

Leighton Meester was spotted in New York City.

The actress was hard a work filming new scenes for her hit show, "Gossip Girl".

Leighton Meester: "Gossip Girl" Gorgeous

Leighton Meester was spotted in New York City.

The actress was hard a work filming new scenes for her hit show, "Gossip Girl".

Leighton Meester: Hard At Work In NYC

Leighton Meester was spotted in New York City.

The actress looked great in a yellow coat and Chanel bag while filming scenes for "Gossip Girl".

Leighton Meester: Hard At Work In NYC

Leighton Meester was spotted in New York City.

The actress looked great in a yellow coat and Chanel bag while filming scenes for "Gossip Girl".

Leighton Meester: Los Angeles Dog Walker

Leighton Meester was spotted out in Los Angeles, California.

The CW actress was joined by a a male friend as she took her dog out for a walk.

Leighton Meester: Los Angeles Dog Walker

Leighton Meester was spotted out in Los Angeles, California.

The CW actress was joined by a a male friend as she took her dog out for a walk.

Leighton Meester: Christian Dior Darling

Leighton Meester was spotted at Fashion Week in Paris, France.

The "Gossip Girl" actress looked gorgeous as she hit up the Christian Dior show.

Leighton Meester: Christian Dior Darling

Leighton Meester was spotted at Fashion Week in Paris, France.

The "Gossip Girl" actress looked gorgeous as she hit up the Christian Dior show.

Leighton Meester: Zadig & Voltaire Shopper

Leighton Meester was spotted in the West Village of New York City.

The "Gossip Girl" actress was joined by some gal pals for some shopping at Zadig & Voltaire.