Fab or Flop: Jennifer Lopez Stuns, Miley Cyrus Bares Her Bra, & More

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Fab or Flop: Jennifer Lopez Stuns, Miley Cyrus Bares Her Bra, & More
Bravo star and low-cal alcohol maven Bethenny Frankel looks cool and fun for summer -- matching a flowy white tank with a teal and white skirt.
Ciara performed on "Good Morning America" wearing this stomach-exposing outfit that left us more confused than anything.
Amanda Bynes can't use her adorable little pup to hide the fact that her sweatpants are a total flop.
Rocking an airy light dress, Eva Mendes has the right idea -- dressing for the summer heat while keeping up her stylish standards.
Real Housewives of New York's Sonja Morgan looks uber sleek in a black dress on the red carpet! The only thing missing is a wine bottle in hand and the Housewife's outfit would be complete.
Ke$ha's leotard may be eye-catching -- but her strange face decorations have got to go.
We know Jennifer Love Hewitt has seen a red carpet or two in her life, so she should know that a tank top is not the proper attire!
A sling is a sling -- Mariah Carey doesn't need to dress her injury up.
Taylor Swift's shiny red top and polka dot skirt combo is great for a casual summer look.
Carly Rae Jepsen's channeling 2007 MySpace style with her neon Converse, ironic hair bow, and ripped jean shorts. Did she travel by time machine to her performance?
JWoww's outfit goes over the top with a multitude of black and white prints, not to mention her waist cape that does little for her style.
Mary-Kate Olsen must have forgotten there's a heat wave in NYC because her super heavy outfit is more out of place than seeing her without her twin right by her side.
Miley's strange ensemble is definitely summer-friendly, but far from stylish.
Rihanna's super casual look is far from glam and fails to turn heads in the way her stunning shades and gorgeous arm candy do.
Catherine Zeta-Jones channels Angelina Jolie with an exposed leg in her stunning black slit dress.
Jane Lynch may have just filed for divorce from her wife, but she should remember that looking good is the best revenge.
Slimmed down Snooki brings the party with a bright pink purse that takes her cute outfit to new heights.
We hope this is just a costume for GIRLS! Zosia Mamet looks like nothing less than a hot mess with a bright pink leopard t-shirt, neon pink skinny belt, a unicorn-inspired top knot, and a far from chic canvas tote.
The City's Whitney Port hits Australia with a cute pink dress and pointy shoulder pads.
Jennifer Lopez (with the ultimate wavy beach hair!) rocks glitzy glamour and fun polka dot fishnets, accentuating her sexy look.
Sporting a top knot and super chic white top, Vanessa Hudgens looks nothing like her High School Musical days of the past.
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Celebs: one week they're totally fab, and the next week they're a total flop! With heat waves taking the country by storm, celebs are breaking out their casual cool outfits and the results are definitely all over the style spectrum!

While Eva Mendes looks effortlessly cool in a flowy dress, Miley Cyrus rings the fashion police's alarm with her mesh bra get-up. Others, like Taylor Swift look simply fab, while Amanda Bynes tries to use her tiny cute dog to cover up her fashion misfortunes.

Click through the gallery to check out all of this week's best and worst celeb style, from Mariah carey to Rihanna to Mary-Kate Olsen!
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