Keira Knightley opted for her trademark romantic look in this gorgeous crystal lace dress at the Toronto Film Festival

With it being both the fashion season and the film festival season at the moment, it’s a pretty good time for sneaking peeks at celebs’ best red carpet and party outfits. Today we weren’t let down at all by what we found.

Keira Knightley was spotted at the Toronto International Film Festival looking absolutely amazing in a nude lace crystal dress, with a sleek dark bob and angelic make up. We think that’s an Elie Saab dress that she’s wearing, lucky girl, but we could be wrong.. This is definitely a look that really works for her – we’re glad she sticks to it. We also spotted Emily Blunt looking quite foxy in a halter-necked black jumpsuit which looked cool with her laidback wavy hair and smoky eyes.

Meanwhile as New York Fashion Week continues, we spotted the Charmed actress Rose McGowan looking extremely sultry in an amazing magenta structured cocktail dress which matched the colour of her lipstick. This is one actress we never thought would come zooming back into our style radar, but we’re often surprised.. Meanwhile, the statuesque Heidi Klum towered over Christian Siriano backstage in a clinging back dress with a sheer chiffon skirt.

The Worst Dressed In The World EVER Award goes to Kelly Osbourne, who rocked up to Fashion’s Night Out in Chicago wearing a red rubber T-shirt. I don’t think I need to say any more than that.

To see who we’ve been spotting, check out the gallery above.

Rachel, who’s famous in the past for weaving fashion magic over Hollywood’s elite, told the fashion site FabSugar: “Nervous, excited, petrified, anxious, terrified . Did I mention terrified? I’m terrified.” Well, if her taste in clothes is anything to go by then the designs will be good – then again, you never can tell til you see it on the runway..

Despite her trepidation, Rachel Zoe is also excited about her new project, having recently compared finishing a collection to “giving birth”. “Being a designer was the thing that I always said, ‘I’m never going to do this, because I’m too scared to do this’. All of sudden during my presentation this season, I was like ‘Oh my god, why am I doing this, I’m too scared to do this. Then it was like, it was almost like giving birth. When it was over, I was like, ‘This is the most exciting, most challenging adventure. This is new, and this is fun.’ ” We can’t wait to see what she comes up with.

Zac, who is loved by all women for his sultry, opulent designs, is moving back to New York Fashion Week because he feels “just like it’s the right time”. The designer said: “Paris is wonderful but it just feels like the right time to show in New York.”

His previous collection for Autumn/Winter 2011, which was showed in Paris, was his trademark array of sculptural-looking evening gowns, this time in leather and metallic fabrics for a harder take on the seventies trend – I absolutely cannot wait to see what he comes up with next, whichever city he’s in.

He went on to explain the city change: “For the Zac Posen Collection, I wanted to give a different voice and focus in the international fashion arena. Obviously, New York has been extremely supportive of me and the stars were aligned to base Z Spoke in my hometown. I have learned over the past 10 years to trust my instinct, to have fun with experimentation and to innovate. I do not see this choice as a focus on Europe, rather, it’s about taking a risk, which is something that is important to do as a creator in order to evolve.”

The show, which will happen on September 12th at the Style 360-Metropolitan Pavilion, will show her new collection which includes dresses, denim, sunglasses and handbags. The press release promises the event to be a “high-energy runway show”, but if her past designs, which have a majorly unappealing Ed Hardy vibe, are anything to go by then I think I’ll give this one a miss, thanks.

The “Girlfriend” singer recently spoke out about her new-found interest in fashion. “When I was younger, I dressed skater and had that whole thing going on. But as I grew up, I eventually started wearing heels and dresses. Over time, fashion choices change. Now that I’m older and have a fashion line, I’m more into fashion. I like to dress with rock ‘n’ roll elements and be casual. I like jeans with rips and skulls, but now I wear more flattering pieces. I would never have worn heels or tight trousers before, or dresses. Today, though, I enjoy it. I’ve grown up.”

Victoria, who has in the past confessed to not being able to live without her heels, recently suffered a slip disc after giving birth to her new baby girl Harper and has been warned by doctors to avoid stilettos and the like to stop the problem getting worse. But Dr, it’s NEW YORK FASHION WEEK! She can’t wear flats!

A source apparently close to Victoria spoke about the high-heels ban: “Victoria’s not had an easy past few weeks. But she’s a trooper and after getting the all-clear to attend Fashion Week – provided her back doesn’t significantly deteriorate – she has been advised to avoid heels. Although her heel-wearing wasn’t the cause of her back problems, stilettos don’t help her condition. Victoria has been frantically surfing the web for an acceptable pair of flats, ones which don’t make her look like a golf club.”

Mama Beckham isn’t too pleased with the prognosis, having previously expressed her hatred for wearing ballerina flats. She said: “I beyond hate ballerina flats – I can’t even walk in them.” However, she’s sucking it up and focusing on getting better for Harper and the rest of the Beckham clan.

When you get a chance, Posh, you should actually put your feet up – we can’t wait to see the new collection either.

Leighton Meester at Marc Jacobs

New York Fashion Week will soon be closing its designer doors for another season as the fashion frenzy moves to London.

However, we’ve had fun, seen a great range of styles from the likes of Marc Jacobs and Jeremy Scott and spotted many a celebrity in the front row.

Christina Hendricks made an appearance at Carolina Herrera in a cute print dress, while Kirsten Dunst and Karen Elson bagged front row seats at Rodarte, both showcasing pale pink frocks. Kirsten opted for the polka dot look while Karen went for fancy and floral.

Kelly Osbourne went for a sequined cream knee length dress and sparkly bolero jacket at Badgley Mischka and Leighton Meester showcased 70s bold prints in a midi length dress at Marc Jacobs.

70s were also a front row trend for Vanessa Hudgens at Anna Sui, who wore a boho print chiffon jumpsuit for her front row appearance.

See all the celeb style above.

Leighton Meester

70s bold prints adorned the front row for Marc Jacobs fall collection at New York Fashion Week.
Leighton Meester kicked started the trend in a gorgeous bright print sleeved maxi dress, complete with a thick waist belt, while Sofia Coppola showcased the look with a similar print and coloured blouse, which she teamed up with linen trousers.

Karen Ellison also showcased the trend in a burnt orange print jumpsuit, while Black Eyed Peas singer Fergie went for a red wrap dress with knee high boots.
Of course these reflected the look Jacobs was going for in his collection, keep reading to see the catwalk range.

Blake Lively

Fashion’s elite came out to play last night at the amfAR charity gala held in advance of New York Fashion Week.

Blake Lively lead the fashion pack in a gorgeous maxi dress with an ethnic print, while Iman went for a plunge neck black frock. Also going for black was Tamara Mellon who went for a strapless fishtail number and Donna Karan who showed off her fashion flair in an embellished dress.

Karen Elson however went for the opposite in a white dress as did Victoria Silvstedt

Helena Christensen shunned the dress for a cute pair of shorts which she teamed up with a blazer really making her stand out.

She made the front row at Jeremy Scott’s catwalk show and she also turned up to the Marchesa party, dressed in a ruffled dress, which looked very much like a Marchesa design, teamed up with peep toe shoes.

Red and ruffles were pick of the day for Kelly Brook who turned up in a short one shoulder satin frock, and Olivia Palermo who opted for this colour in a shift frock with detailed sleeves.

Molly Sims went for a cute white dress, teamed up with peep toe boots, while Natasha Bendigfield went for a sheer black frock for her night out.

Jessica Szohr

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Mercedes-Benz Fashion Week Spring/Summer 2011 - Marchesa - Outside Arrivals New York City, USA - 16.09.10 Mandatory Credit: A. Miller/WENN.com

Alexa Chung once again made an appearance, this time for the Philip Lim  show in a black dress over a flowing cream top. Coco Rocha also opted for a black frock at the same show, which she accessorised with orange lippy (what do we think ladies, like or loathe?)

Kelly Osbourne went for a glam look in a black bustier dress teamed up with blue heels for the Jeremy Scott show and Beyonce’s sister Solange went for a jewelled jumper for the same event.

Unsurprisingly Kelly Rowland went for the double denim look for G-Star Raw, which we predict was from the label, and Denise Richards worked the Capri pants and cardi look at the Pamella Roland show.

See all the star style below.