Fab or Flop: Jenna Dewan's striped dress and Farrah Abraham's overdone disaster

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Fab or Flop: Week of July 18
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Fab or Flop: Week of July 18
FLOP: Model Christie Brinkley basically looks amazing all the time,but why she chose to wear overalls in the middle of the day is beyond us. (Photo by Raymond Hall/GC Images)
FLOP: Perhaps someone should have notified "Teen Mom" star Farrah Abraham that this is not appropriate for midday in Manhattan. You're a touch overdone, girl. (Photo by Alo Ceballos/GC Images)
FAB: Alicia Vikander has been rocking every single look lately, and this pretty dress with a sweet cutout is no exception. (Photo by James Devaney/GC Images)
Nicole Scherzinger was on-trend with a crop top, but this matching pant and crop combo is a total mess. (Photo by David M. Benett/Dave Benett / Getty Images for JUST EAT)
FAB: Pippa Middleton not only has the newly-engaged glow, she also has a stellar fashion sense. The soon-to-be-bride looked breezy and romantic in this silk, floral frock with nude heels. We can't get enough of the summery vibe. (Star Max/IPx)
FLOP: Dear Simon Cowell, it's really time for you to find jeans that aren't from the 80s. The wide-leg jeans with an oversized shirt is just not a good look. (Photo by Josiah Kamau/BuzzFoto via Getty Images)

FAB: Zoe Saldana attends dazzled in a periwinkle blue frock with sheer sections from Givenchy Haute Couture by Riccardo Tisci, The look for the world premiere of 'Star Trek Beyond' was jaw-dropping. 

Photo credit should read JEAN BAPTISTE LACROIX/AFP/Getty Images)

FLOP: Khloe Kardashian is looking hotter than ever lately, but that doesn't mean cutting off your jeans and wearing them as knee-hugging shorts is cute. (Photo by BG010/Bauer-Griffin/GC Images)

FAB: Wow! Doutzen Kroes nearly had a wardrobe malfunction in this copper silk dress with a revealing neckline and a wraparound skirt with a sexy slit -- but she looks incredible. Her look, with tousled tressed and bold red lips, is giving us major "Bond Girl" vibes. Kroes was attending a party in Saint Tropez, France. (KGC-195/STAR MAX/IPx) 

FLOP:  Georgia May-Jagger donned a bizarre sheer bandeau top and skirt combo with a set of chunky red heels that screamed '90s in all the wrong ways. 

. (Photo by Robert Kamau/GC Images)

FAB: We're mad for Jenna Dewan-Tatum's pretty striped dress! (Photo by Alessio Botticelli/GC Images)
FLOP: We always love Rachel Bilson's sweet style, but this billowy number doesn't necessarily flatter her figure. (Photo by Alessio Botticelli/GC Images)
FLOP: Honestly, we don't even know what Jenny McCarthy is wearing, but it isn't remotely cute. The funky green and black jumpsuit doesn't do her any favors. (Photo by Raymond Hall/GC Images)
FAB: Actress Katharine McPhee dazzled in a bedazzled dress at Comic-Con. (Photo by Jerod Harris/Getty Images)

FAB: Camila Alves stunning in a breezy, white jumpsuit as she strutted across a New York City street. McConaughey's wife rarely does runways anymore, but clearly she hasn't lost her model style. 

Photo by Alessio Botticelli/GC Images)

FAB: Cara Delevingne gave her hair a fresh chop ahead of the Comic-Con panel for "Suicide Squad" and we love her punk-chic look. (Photo by Albert L. Ortega/Getty Images)
FLOP: Rita Ora apparently decided that dressing like Big Bird is a really good idea. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
FAB: Olivia Palermo can basely do no wrong in this prett whit T-shirt and skirt combo. (Photo by Raymond Hall/GC Images)

Sometimes looking good is all about timing!

For example, wearing a cocktail dress midday in New York City as you walk down the street probably isn't the best course of action, especially if you want to snag a spot on the best-dressed list. Apparently, nobody passed that memo to "Teen Mom" star Farrah Abraham though. The reality star-turned-porn star wore a lacy, black cocktail dress that looked way too overdone for an afternoon stroll.

Christie Brinkley was also a victim of ill-timing. The normally on-trend model stepped out in a set of overalls on one of the hottest days in NYC. What were you thinking Christie?

On the other hand, some of this week's best-dressed celebs nailed not only the timing of their look but also the season. Jenna Dewan-Tatum, Olivia Palermo and Alicia Vikander all dazzled in sweet, summery looks that were perfect for the week's hot temps. Tatum's striped dress screamed pretty and ladylike with a touch of nautical.

Check out the best and worst dressed stars this week!

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