While most of us were watching the Royal wedding this week in awe, fashion designers were paying careful attention to the dress that Kate Middleton was wearing. Brides-to-be who fell in love with Kate's gown will pleased to learn that designers watching took detailed notes and hurried sketches in a frantic rush to create mass-produced versions that will hit stores as early as late June.

If you can't wait the four weeks it will take to get the knock-off version, David's Bridal was already touting a strapless look from Oleg Cassini paired with a lacey bolero jacket on its website as the already available version of the knockoffs that will hit their stores in September.

Those eying up Kate's jewelry will be able to pre-order knockoffs of earrings on QVC as early as Monday night. The piece will sell for under $60 and will be created by Kenneth Jay Lane, and will be available to shoppers in two months.

According to Women's Wear Daily, British singer Lily Allen has a new line of clothing in the works. She's teaming up with her sister, Sarah Owen, for a new collection focused on vintage-inspired garments.

The line will be called "Lucy in Disguise", the same name as their vintage shop located in London's Convent Garden district. Reportedly, the new line was designed with a fictional clotheshorse named Lucy in mind.

At a press conference, Allen explained:

"(Lucy's) a time-traveling fashionista, who's inviting you to explore her wardrobe. It's a great opportunity to play with the character."

Included in the collection are many types of dresses inspired by several different decades. The dresses will hit stores in June, and will retail from $175 to $630. In the U.S., they'll be available on shopbop.com. In the U.K. they'll be available at the Lucy in Disguise store, lucyindisguiselondon.com, Harvey Nichols and other international shops.

Jessica Simpson might act like a dumb blond, but she's at least smart enough to have hired someone to help her make the right business decisions. Jess just announced that she's expanding her billion fashion empire to include prom dresses.

Simpson's prom collection will be available at David's Bridal and will feature an assortment of long, short, and ball gown dresses. They will range in price from $139 to $229.

In a statement, Jessica said:

“Inspired by the fabulous designer gowns I’ve worn to red carpet events, my affordable collection is designed to fit and flatter a variety of body types and help girls achieve their own red carpet style for Prom.”

Love fashion but hate designer prices? Stores like Forever 21 and H&M are your best friend, with their awesome collections of designer inspired clothing. But they go even further and sometimes even sign on designers to do a collection just for their store. Such is the case with Forever 21, who've now teamed up with House of Petro Zillia.

House of Petro Zillia is a favorite with Hollywood celebrities, including Kim Kardashian, and Paris and Nicky Hilton, amongst many others. They love it for its fun, funky designs and bright colors.

Nony, House of Petro Zillia's designer, said that she's thrilled about the collection:

"I'm tickled pink about the collection coming out! And so excited about this collaboration with Forever 21 as I can't wait to bring more fashion smiles to more fashionistas!!!"

The Petro Zillia for Forever 21 collection will hit stores on February 11. That's next week!

Everyone's favorite designer-style-on-a-budget chain retail shop H&M announced on Thursday that it is working with cult shoe label Swedish Hasbeens to bring its unique wooden-soled style to the rest of the world. Three styles of wooden-soled clogs made exclusivel for H&M will be available in 150 H&M stores worldwide beginning on April 20th.

The particular shoes designed for H&M were inspired by the traditional Swedish styles of the 1970's, and use handcrafted and environmentally friendly materials.

Ann-Sofie Johansson, H&M's head of design, commented:

“I love the genuine feeling you get from Hasbeens, from the wood and the leather, and also how they take something traditional and Swedish and make it contemporary and modern. These Hasbeens for H&M fit perfectly with the ’70s bohemian look that’s so important this coming season.”

Emy Blixt, founder and designer of Swedish Hasbeens, also said:

“We have a strong belief in making better shoes for a better world. We want to make fashion more fun, creative and friendly to both the environment and people. We have loved designing for H&M! It’s a fantastic opportunity to spread the idea of Hasbeens and make these shoes available to more people around the world.”

Photo: The Mulberry bag on the left goes for $1,450. The one on the right, made for Target, goes for just $49.99.

If you've always dreamed of owning a posh British Mulberry bag, but haven't been able to afford the over $1k price tag that most of their stuff carries, there's good news - Target has just unveiled their new Mulberry for Target line. The line hit store shelves on Sunday, and in just hours their online stock sold out.

Many stores across the country are now either sold out, or are on the verge of selling out. Expect these bags to be popping up for more than their $49.99 and up price tags on eBay.

The line's Large Cerise Leopard Satchel goes for just $49.99, compared to a similar purple leopard Alexa Hobo bag that goes for $1,450 from Mulberry's original collection.

If you're hoping to snag one of these bags (other designs are also available), check out your local Target stores sooner rather than later because these aren't going to last!

What kind of pants can you expect retailers to try to sell you on this autumn? Look no further. Here are the four biggest trends in trousers for women this fall:

Straight

These pants don't flare out at the bottoms and can look silly with the wrong pair of shoes. They are best paired with a cute heeled shoe, and are a great choice if you have larger thighs.

Skinny

Think of leggings and that's pretty much what "skinny" pants are. These form-hugging pants come in a variety of fabrics from denim to polyester blends and more. They're not very flattering on many women, unfortunately and are best left to the underfed catwalk models and genetically blessed.

Forget Uggs. This season's hottest boots are a lot more furry and funny-looking. They're fuzzy, fluffy Yeti boots. Yep, these are the same ugly boots that were on disco dance floors in the 1970s and that were revived by Kate Moss and crew in the late 1990s. In the fashion world, even bad trends come back again.

Victoria Beckham, 36, may be a twig that subsists on edamame beans, she insists that she is a healthy size 6 and chalks her figure up to being a busy mother of three and a businesswoman. Nevertheless, the former Spice Girl has banned size zero models from appearing in her New York Fashion Week runway show.

Beckham's Spring 2011 collection will instead be modeled by health girls who look "realistic" to encourage a positive image to impressionable teens. Anyone smaller than a size six simply won't be allowed to participate.

Beckham reported denied twelve models from appearing in her show after deeming them "too skinny".

Sitting in the front row at her fashion show will be Tom Ford, Kristin Davis, Sarah Jessica Parker and Mary J Blige.

Us working stiffs might actually have a shot at owning a designer piece of clothing from the fashionable Paris label, without having to sell an arm or a leg. It's now rumored that Lanvin and H&M will announce within the next week that they're collaborating to bring Lanvin clothes to both men and women at H&M shops.

H&M has also been posting 23-second highly stylized black and white videos on both Facebook and YouTube, featuring quotes from a mystery design coming through the mouths of men and women. At first it was thought that Tomas Maier of Bottega Venetta and Carolina Herrera were the mystery designs, but fashion bible WWD quips that:

"While the camera never lingers on the faces long enough for recognition in the clips, the voice-over of designer musings, while electronically altered, are unmistakable Elbaz-isms."

It looks like WWD was spot-on in their guess. Margareta van den Bosch, creative advisor at H&M, confirmed that the collection of menswear and womenswear will go on sale on November 23 in around 200 H&M stores globally. H&M will officially unveil the collection on November 2.

Speaking of the collaboration with H&M, Alber Elbaz, artistic director of Lanvin said:

“I have said in the past that I would never do a mass-market collection, but what intrigued me was the idea of H&M going luxury rather than Lanvin going public,”

With Alexander McQueen(sadly) out of the picture, Lanvin is now the coolest kid on the block in the fashion world and everyone will be dying to get a piece (or ten, or twenty) from the collection. Expect it to sell out fast.