BEST: R&B singer Ciara was effortlessly chic while shopping on Robertson Boulevard in Los Angeles on Friday, we’re sure that nothing sure bought was as stylish as this flared black pant suit.

BEST: Tron: Legacy star Olivia Wilde banged out a hot style with a messy high pony-tail and floor-length Yigal Azrouel Resort 2012 pattern gown at the 10th Chrysalis Butterfly Ball in Los Angeles on Saturday.

BEST: Twilight star Ashley Green showed Joe Jonas what he’s missing in a slim-fitting coral Fendi gown at the 10th Chrysalis Butterfly Ball in Los Angeles on Saturday that showed off her flawless figure. The Jonas Brothers singer’s ex-girlfriend added a flash of color with chunky bangles and hoop earrings.

BEST: Hippie chic and summer fun were the themes of the day for Olivia Munn at she smoothly blended 70s style flairs, pretty pastels and lace at the 22nd Annual Elizabeth Glaser Pediatric AIDS Foundation Carnival in Los Angeles on Sunday.

BEST: Newly-engaged Twilight star Nikki Reed was spot-on in a polka dot dress at the Step Up Women’s Network Inspiration Awards on Friday, but all eyes were on her wedding finger not her outfit as she showed off her sparkling engagement ring from fiancé and former American Idol contestant, Paul McDonald.

BEST: Man’s best friend makes a great fashion accessory! Eva Mendes dressed up a causal white t-shirt and flowing pattered shirt with her beautiful Belgian Malinois dog, Hugo, in West Hollywood.

WORST: We hope she didn’t design that outfit! After being criticized for being too thin, The City star and aspiring fashion designer Whitney Port hid her slim legs under baggy grey sweat pants and an over-sized blazer on Sunday in New York. Port recently released a book entitled True Whit: Designing a Life of Style, Beauty, and Fun – hopefully dressing like a bag lady isn’t one of her top tips!

WORST: Just when we thought Mischa Barton was out of her fashion rut, she stepped out at the Shanghai International Film Festival in China looking like a show dog in a sheer black tulle dress with a high-ruffled feather neckline that gathered and puffed in all the wrong places. Red platform shoes added to the ‘What was she thinking?’ element.

WORST: Nicole Scherzinger unveiled some stunning outfits while judging the X Factor auditions last week but she seemed to leave her style in the America and resorted to wearing a leather trash bag-like dress and knee-high boots when back in London on Sunday at the Capital FM Summertime Ball at Wembley Stadium.

WORST: With bulging muscles and ripped jeans, usually demure and girly Sarah Jessica Parker was a very manly sight as she walked around New York City’s West Village on Friday.

WORST: Naturally casual Jennifer Garner looked like she would be much happier wearing her usual sweater and jeans combo when she appeared at the 10th Chrysalis Butterfly Ball in Los Angeles on Saturday glammed up in a little black dress by Prada.

WACKIEST: Anaconda star Jennifer Lopez took revenge on her movie attacker in a snakeskin dress and thigh-high Louboutin boots at the Summertime Ball at London’s Wembley Stadium on Sunday. The American Idol judge should be relieved that no one was critiquing her on her scaly style as she’d never make it to Hollywood in that outfit.

WACKIEST: It looks like someone forgot their dress! Lady Gaga topped the wow factor of last week’s see-through dresses by opting not to wear one at all and flash her lingerie under a shiny leopard print jacket. Even worse, she’s worn this outfit three times before.

WACKIEST: Fitness fanatic on her top half, school girl on her bottom half. Glee star Heather Morris appeared very confused about what look she was going for as she skipped through the streets of Toronto in running shorts, hoodie and heeled ankle boots and knee high socks on Friday.

BEST: Fresh-faced Jessica Biel managed to stay stylish and comfortable (not an easy feat!) in leather pants and a white fitted blazer when she flew into Toronto on Sunday to begin filming Total Recall, a remake of the Arnold Schwarzenegger 1990 big budget blockbuster.