New Fashions Style: Kim Kardashian's Engagement Ring and a Fashion Extravaganza with the Royals, Obamas, Camerons & Cannes

So Kim Kardashian's engaged. The ring is apparently 20.5 karats and features a 16.5-karat emerald-cut centre stone flanked by 2-karat trapezoids.

Kim's engagement ring from Kris Humphries is said to have cost a cool $2 million--literally more than Kim's house. I wish those two krazy kids the best of luck. I, mean, really, how could Kim not have married a man named Kris (with a "K"). [via]

Battle of the Belts:

Michelle Obama and Samantha Cameron served lunch at a BBQ

at 10 Downing Street today. Michelle wore a black-and-white

Tracy Reese dress. The sparkly belt is a bit much for pasta salad, no?

SamCam wore a cotton-twill dress with an electric green belt

from Jonathan Saunders. [via]

Can't say I really loved the white Tom Ford gown that Mrs. Obama wore to the state dinner last night. It's not offensive or anything, there's just...something off about it. Maybe the gloves. Ford is a great choice, though, an American with a HQ in London. Samantha Cameron wore Emilia Wickstead to the event at Buckingham Palace. [via]

We got our first look at post-honeymoon William and Kate, looking tanned and relaxed as they welcomed the Obamas to England during the Americans state visit. Apparently the meeting was short and the newlyweds didn't participate in any of the other official events, ostensibly to underscore the fact that they're not officially working members of the family.

Anyhoo, Kate wore another Reiss dress, this time the Shola Bandage Dress, soon to be named the Kate, the Catherine, the Duchess or something of the sort. After Kate was seen wearing the dress the Reiss website crashed, ostensibly with people trying to get their hands on their own version. The Duchess has a great knack of making relatively affordable outfits (£175) look totally first rate. Kate--Catherine, whatever--accessorized with simple black pumps and an Anya Hindmarch clutch (the Maud, I believe).

Michelle Obama wore a colourful outfit from Barbara Tfank.

Not loving it, maybe its the pink bolero that's throwing me off.

I think, in this case, Kate wins the style wars.

And I do like Kate so I don't want to criticize, but do her arms look like they're veering into scary skinny territory in some of these pics? Just me? Maybe its the angle, but don't they have food in the Seychelles? [via]

I liked Michelle Obama's second outfit--her bright purple dress is from Roksanda Ilincic's Pre-Fall collection and her blue coat is by Narciso Rodriguez--better than the first. Samantha Cameron looked chic in Peter Pilotto and grey snakeskin Jimmy Choo platform heels. [via]

Michelle and SamCam seem to get along quite well.

Check out the Prime Minister's chic digs. [via]

When arriving in England Michelle Obama wore a

bold blue suit from Preen with a printed blouse. [via]

And now on to Cannes where trends like wearing white with emeralds,

long sleeved gowns and deep blues were all the rage...

Uma in a Body Hugging, Long Sleeved Electric Blue Armani Prive

Jury member Uma Thurman has one of those bodies just made for wearing clothes. I'm pretty sure I loved just about everything she wore. And that she wore most of her gowns with flat sandals and did so with aplomb.

Uma wears Chanel Haute Couture with a VBH clutch and Jimmy Choo flats

In Roland Mouret

In Grey Chanel Haute Couture

In a Feathered White Atelier Versace Gown and Chopard Emeralds

Photo Credit: Getty via CBS.com

I loved Bianca Balti's white Alberta Ferretti gown, which

the Italian model-actress accessorized with de Grisogono jewels.

Cristiano Ronaldo's GF and Sports Illustrated model Irina Shayk

also went for white (Atelier Versace) and green at the amfAR gala.

Eva Herzigova wore her emeralds with a shorts suit.

Doesn't Jane Fonda look great? The actress sported dangling emerald earrings and a long-sleeved Roberto Cavalli gown at the amfAR gala during the Cannes festival.

Longtime emerald fan Angelina Jolie paired jewelry from her own line with an understated, but very pretty, nude dress from Salvatore Ferragamo accessorized with a brown belt and nude pumps.

Angelina's style if often a bit too boring for my taste but I think her classic looks worked well at Cannes, including the strapless, slit-up-to-there Atelier Versace gown she wore. But what's up with Brad?

Blue was a huge colour on the Cannes red carpet with everyone from Uma to Aishwarya Rai jumping on the blue bandwagon, many in dresses with long sleeves. Jodie Foster, for example, looked classically sophisticated in Armani.

Bar Refaeli looked stunning in a dark blue, long sleeved Cavalli with plunging back and silver embellished cut-outs. Is that fashion code for "Eat your heart out Leo"?

Actress Gaia Bermani Amaral also wore a dark blue, long-sleeved Cavalli.

She accessorized with a Sergio Rossi clutch.

Karolina Kurkova wore a sparkly blue Armani Prive.

And how hot is Penelope Cruz in Stella McCartney?

I adored this look right down to the Casadei pumps.

Much better than the frou-frou Marchesa she wore later.

Not Cannes, but Penelope also looked smokin' in a form-fitting, futuristic long sleeved red Armani Prive gown at the Pirates of the Caribbean premiere in Munich recently. Baby? What baby?

Cheryl Cole appears to be a fan of the long sleeves, wearing gowns by both Stephane Rolland and Roberto Cavalli. I much prefer the second look.

Bar Refaeli in another knockout Cavalli, this time champagne-gold at amfAR. Elisabetta Canalis looked pretty hot at that party too in a bronze-gold Cavalli. Milla Jovovich also wore a metallic gold gown but hers was from Atelier Versace.

I hardly ever like Kirsten Dunst but I thought her yellow Chloe day dress was one of the prettiest looks of the whole festival. The Chanel she wore to accept the Best Actress award wasn't too shabby either, although I don't get the black shoes.

Tilda Swinton is also one I'm often on the fence about,

but she hit it out of the park at Cannes.

I'm a fan of Jessica Chastain's red Oscar de la Renta

and bright lemon yellow Zac Posen.

Some other pretty looks:

Italian Blogger Chiara Ferragni

SJP in Elie Saab

Diane Kruger is movie star glam in Calvin Klein.

There were a lot of horrible outfits--from Charlotte Gainsbourg

and Bryce Dallas Howard on--but I'm not going to go in to them all here.

I'd love to hear who your favourites/least favourites were.

Cannes Photos: Getty, Daily Telegraph UK, Zimbio, LIFE, modish-blog.blogspot.com, celebrything.com

Oh, and what do you think of this fuchsia dress on Katie Holmes? I kind of love it. The dress is from Katie's own line, Holmes and Yang, which I didn't even know existed. [via]