0419_best_launch The stars definitely shined this week!

From after-parties to award shows, Hollywood’s hottest starlets had plenty of opportunities to strut their stuff.

Leighton Meester was the picture of perfection at the opening night after party for Broadway’s "Of Mice and Men," rocking in a navy chiffon gown with a plunging neckline and fitted bodice by Versace. To complement her elegant ensemble, the newlywed accessorized with a white clutch and jewelry from Kimberly McDonald and Jacob and Co. The former "Gossip Girl" star wore her luscious locks in loose waves and amped up her makeup with a smoky eye and soft pink lip. 

Kate Bosworth looked beyond beautiful at the launch of CHOO.08 by Jimmy Choo in Beverly Hills on Tuesday. The blonde beauty wowed in a white, A-line Dior dress with silver bodice embellishments that she paired with a shimmery Jimmy Choo clutch and matching pumps. To finish off her look, the 31-year-old wore her hair down in a sleek, straight style and opted for a fresh-faced makeup look with a bright pink lip.

And Jennifer Lopez arrived to the set of "American Idol" on Wednesday looking better than ever. The brunette beauty stunned in a form-fitting, sleeveless, mustard-yellow leather dress by Phillip Armstrong, paired with nude Jimmy Choo pumps and Jacob and Co. animal print bangles. The sexy singer left her long locks down with tousled waves, accenting her beautiful brown eyes with smoky makeup and a coral-colored lip.

Who do you think was the best dressed star of the week? Sound off below, and click "Launch Gallery" above to see more chic celebs.

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