Cannes Film Festival: The best and worst dressed

<b>Cannes Fashion</b> Not everyone brings their best fashion sense to France. Check out the best and worst looks of the 66th Annual Cannes Film Festival. (Reuters)

<b>Jessica Chastain: Worst</b> May 21: The "Zero Dark Thirty" star looks frumpy at a screening of the film "Behind the Candelabra." Isn't she warm? (Reuters)

<b>Rosario Dawson: Best</b>  May 20: White seems to be the best color for the south of France. Rosario Dawson has the perfect complexion and physique to pull it off at the screening for "Wara No Tate" (Shield of Straw). (Reuters)

<b>Carey Mulligan and Justin Timberlake: Best</b> May 19:  Although J.T's wife Jessica Biel was in attendance - and needing some major fashion advice - Justin looks dapper as usual alongside co-star Carey Mulligan who also looks chic in black and white.  (Reuters)

<b>Jessica Biel: Worst</b> May 19: How is it that hubby Justin Timberlake always looks good and yet Jessica has no eye for fashion at all? The dress looks like it's stuffed with chickens and the snake necklace is just odd.  (Reuters)

<b>Adrien Brody: Best</b> May 21: The actor looks polished and has his own golden accessory, partner Lara Lieto. (Reuters)

<b>Jane Fonda: Best</b> May 19: Seniors don't tend to make it onto best dressed lists very often, but Jane's age appropriate cut and va-va-voom color get her there.  (Reuters)

<b>Kirsten Dunst: Worst</b> May 19: The actress looks like she's back in her movie "Interview with the Vampire" in this number.  (Reuters)

<b>Marion Cotillard: Best</b> May 20: The film festival can be a long week for some actors and actresses, and they don't always hit the mark with their attire. Here, with director Guillaume Canet, Marion looks flawless.  (Reuters)

<b>Milla Jovovich: Worst </b> May 21: While showing skin has been in this season, Milla went a bit overboard with this dress for the screening of "Behind the Candelabra." (Reuters)

<b>Sharon Stone: Best</b> May 21: It's official, Sharon Stone will never dress her age.  (Reuters)

<b>Zoe Saldana: Worst </b> May 20: Zoe looks like she borrowed her hotel window curtains and made a dress out of them.  (Reuters)

<b>Matt Damon and Luciana Barroso: Best</b> May 21: Matt and wife Luciana look picture perfect at the screening for "Behind the Candelabra." (Reuters)

<b>Emma Watson: Absolute Best</b> May 16: The young actress is really trying to show her fans how mature and grown up she has become and with looks like this, we believe her.  (Reuters)

<b>Paz Vega: Best</b> May 15: Paz Vega pushes fashion boundaries in Cannes as she arrives in a predominantly see-through dress for the screening of "The Great Gatsby." How very French of her. (Reuters)

<b>Liv Tyler: Worst </b> May 17: Liv is never really on the best dressed list, so it's no surprise that in Cannes it's no different.  (AP)

<b>Julianne Moore: Worst</b> May 15:  This dress would like really good on a 12-year-old, Julianne is about four decades too old for it.  (Reuters)

<b>Eva Longoria: Best</b> May 17: The petite actress looks statuesque in a golden form-fitting gown.  (AP)

<b>Carey Mulligan: Best</b> May 15: "The Great Gatsby" star knows how to dress it up at night in gowns and go for more casual daytime looks for photocalls (like this one). (Reuters)

<b>Leonardo DiCaprio: Best</b> May 15: Like his co-star from "The Great Gatsby," Leo knows a thing or two about dressing up or down depending on what the occasion calls for. This is a perfect daytime look. (Reuters)

<b>David Hasselhoff: Worst</b> May 16: The TV personality puts his eccentricity brightly on display as he poses with his girlfriend Hayley Roberts on the red carpet. The only thing that could have made this look worse is if she wore a hot pink dress to match. (Reuters)

<b>Cindy Crawford: Best</b> May 15: The super model looks white hot! This dress has just the right amount of shimmer and shows a conservative amount of skin. She looks stunning. (Reuters)

<b>Isla Fisher: Best</b> May 15: Isla proves that the redheads can undoubtedly pull off bright red gowns.  (AP)

<b>Nicole Kidman: Worst</b> May 15: The actress, and jury member of the 66th Cannes Film Festival, just missed the mark on blending cute with flirty. (Reuters)

<b>Marion Cotillard: Best</b> May 17: The French actress was born in Paris and looks right at home at the festival. (Reuters)