PHOTOS: The Best, Worst And Wackiest Dressed Stars Of The Week

1. BEST: Pia Toscano showed off her hot bod in a tight dress at the KIIS 102.7 Teen Choice Awards Lounge at The W Hotel in Los Angeles.

2. BEST: Heidi Klum looked uber chic in a Francesco Scognamiglio LBD at the Project Runway 10th Anniversary Party, pairing the designer dress with Valentino heels and Lorraine Schwartz bling

3. WACKY: Richard Simmons showed off his eccentric aerobics attire on the streets of West Hollywood, wearing a feathered leotard with crazy tights and white sneakers.

4. BEST: Coco flaunted her larger than life artificial assets at the London premiere of Ice-T’s The Art of Rap, wearing a skintightboobilicious dress.

5. BEST: Ashlee Simpson steamed up the Samsung Galaxy III Event in NYC, rocking red leather shorts and a white blouse, both Alice + Olivia,with black booties and a cute Daniel Swarovski snakeskin clutch.

6. WORST: Mischa Barton could not pull off her gold-cuffed Temperley London gown at the Johnnie Walker Gold Label launch party in London.

7. BEST: Marion Cotillard looked classy and cool in Christian Dior Couture at the London premiere of The Dark Knight Rises pairing the houndstooth and textured strapless number with bright red Dior accessories.

8. WORST: Talk about fruity fashion! During her vacation in Sardinia, Rihanna hit the shops in a skintight, swimsuit-style Topshop pineapple romper, which she paired with a leather visor, a fringed Chanel bag and white platforms.

9. BEST: Hailee Steinfeld looked adorable in a fabulous floral sequined Marc Jacobs dress from the Resort 2013 collection at the New York premiere of The Dark Knight Rises.

10. WORST: Zoe Kravitz had a little too much boobage exposed with her Emilio Pucci sheer sheath at the New York premiere of The Dark Knight Rises.

11. BEST: Anne Hathaway looked absolutely angelic in a Prabal Gurung gown at the New York premiere of The Dark Knight Rises.

12. BEST: Jessica Alba showed off her superior sense of style in Salvatore Ferragamo at the 2012 Giffoni Film Festival.

13. WORST: Emmy Rossum missed the menswear mark at Comic-Con, wearing a Ralph Lauren short suit that was far from flattering.

14. BEST: Brooke Burke Charvet looked sexy at Miami Swim Week, rocking a sleek wetsuit-inspired dress with hot heels to the Lisa Blue fashion show.

15. BEST: Ashley Tisdale looked white hot in a camilla and marc bustier dress at the Step Up Revolution premiere, adding black and white Jimmy Choo sandals and a Lulu Guinness clutch

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16. BEST: Christina Milian looked far from mellow in yellow and pink at the Lisa Blue fashion show during Miami Swim Week.

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17. BEST: 46 and sexier than ever, Kyra Sedgwick looked red hot at David Letterman, in a sexy and snug cocktail dress.

18. BEST: Lea Michele looked beautiful in blue at Valspar Hands for Habitat in New York, pairing her fun Oscar de la Renta frock with blackVersace heels.

19. WORST: Debbie Harry made sure to be noticed at the Project Runway 10th Anniversary, wearing an orange and turquoise frock over orange pants.

20. BEST: She’s got legs! Eva Longoria showed off her superior stems in a super sexy white short suit, kicking of Lay’s Do Us The Flavor contest in NYC.