Fab or flop: Justin Bieber's new look, Lindsay Lohan's fresh face, & more of the best & worst of this week's celeb style

Fab or Flop 9.12
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Fab or flop: Justin Bieber's new look, Lindsay Lohan's fresh face, & more of the best & worst of this week's celeb style
Selena Gomez looked absolutely fabulous in this simple black look with a matching black and white handbag.
Oh, Lil' Kim...
Super mom Angelina Jolie was stylish in a casual black dress while she's out with her beautiful family.
Justin Bieber's new mustache is all kinds of wrong.
We usually wouldn't recommend mixing bright yellow and army camouflage, but Cara Delevingne can pull off just about anything.
Jessica Chastain is beyond gorgeous, but her dress looked like she's going to prom.
Teresa Giudice may be in trouble with the law, but she's on great terms with the fashion police!
Karlie Kloss never fails to look absolutely adorable!
Where do we even begin with Rihanna's latest look?
In a simple dark purple dress, Kristin Cavallari stunned on the runway.
Marisa Zanuck has gotten a little more chic since being a friend on the Real Housewives of Beverly Hills. She now stands out on her own.
Reality TV star and creator of the Drink Hanky,  Amanda Bertoncini, rocked a fun and tight red dress this week, showing off her slim and sporty figure.
We are not fans of Lady Gaga's latest wig--it's almost as big as she is!
Lindsay Lohan looked positively radiant out and about in NYC this week.
We don't think we can fall in love Paris and Nicky Hilton's style any more than we already do!
Jessica Alba wowed us with her street style this week at New York Fashion Week.
We may love Miley, but we're not fans of her baggy, flowing pants, even if they may be having a trendy moment.
Bethenny Frankel put together a perfectly bright outfit for the re-launch of her talk show.

Celebs are fickle fashion creatures. Some weeks they look like a million bucks, and other times you're wondering if they got dressed in the dark. As celebs hit the red carpet, stepped out for lunch, and attended the hottest parties, we were there every step of the way, tracking the best and worst of this week's celeb style!

Plenty of celebs, like Jessica Alba and Selena Gomez looked absolutely fab and sexy this week, while others like Justin Bieber and Rihanna turned out to be total flops.

Click through the gallery above to check out the best and worst of this week's celebrity style and find out who's Fab and who's a Flop!
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