Rihanna and Eva Mendes looked effortlessly gorgeous at the 5th annual DKMS Gala at Cipriani Wall Street. Love RiRi's updo!

The annual event, aimed at finding relief for those suffering from leukemia, was emceed by Pharrell Williams and included a performance by Mary J. Blige.

See which Gossip Girl star shined on the red carpet ...after the jump.

Apparently Sarah Palin is still bitter about the 2008 interview Katie Couric conducted that made Palin appear uniformed, to say the least.

After Couric announced her plans to step down as the CBS Evening News anchor to focus on "multidimensional storytelling," Palin cracked to Fox News:

"Yeah, and I hear that she wants to now engage in more 'multidimensional storytelling' versus I guess just the 'straight on, read into the, that teleprompter screen storytelling.' More power to her. I wish her well in her 'multidimensional storytelling.'"

Meow!

Charlie Sheen is mouthing off after reports were released Thursday that Two and a Half Men would continue without him.

Sheen calls the show's co-creator Chuck Lorre an "a**hole p**sy loser," a "low rent, nut-less sociopath" and a "sad silly fool" in a letter released today.

"No one cares about your feeble show without me," Sheen wrote.

Sheen was fired from the show by CBS and Warner Bros. in February after a public war of words with Lorre. He seemed mad that Lorre hasn't tried to mend things with him, and wrote:

"Not even a phone call to the man that put you on the map. The man that put 500 million dollars in your pockets ... I busted my a** for eight years to support your vision."

Sheen is currently suing Lorre and Warner Bros. for $100 million, but has been vocal on his national tour that he wants to come back to the show.

See what Lorre's plans for the show's future are after the jump.

Twitter

Katy Perry is showing her love for the Duke and Duchess of Cambridge on her nails! Russell Brand's wifey certainly has a flair for the unusual.

Along with the above picture, Katy tweeted:

"In honor of the Royal Wedding, I present you... My royal NAILS! CONGRATS!"

The images on her fingernails include William as a baby with Princess Diana, with brother Prince Harry and with new bride Kate.

Pool

Now that the wedding ceremony has passed, William and Kate are enjoying their wedding reception at Buckingham Palace ... hosted by the Queen.

Close to 650 guests were invited to the lunchtime reception and feasted on the following menu:

Cornish Crab Salad on Lemon Blini

Pressed Duck Terrine with Fruit Chutney

Roulade of Goats Cheese with Caramelised Walnuts

Assortment of Palmiers and Cheese Straws

Scottish Smoked Salmon Rose on Beetroot Blini

Miniature Watercress and Asparagus Tart

Poached Asparagus Spears with Hollandaise Sauce for Dipping

Quails Eggs with Celery Salt

Scottish Langoustines with Lemon Mayonnaise Pressed Confit of Pork Belly with Crayfish and Crackling

Guests munched on over 10,000 canapes and sipped on Pol Roger NV Brut Reserve Champagne. The stunning eight-tiered fruit cake, designed by baker Fiona Cairns, was decorated with 900 iced flowers.

See the entire menu ... after the jump.

Security was high for the royal wedding today ... $35 million high.

Reportedly, 5,000 police officers (or Bobbies, as the Brits call them) along with Army, Navy and Air Force personnel were on hand at the event for security. Most were stationed along the wedding route.

And those thousands of people were hired for a $35 million total price tag.

The police also conducted raids in the days before the wedding on nearby homes in a pre-emptive strike. They arrested seven protesters and took away a guillotine from one. Scary!

The officers also moved protesters from the front of the Houses of Parliament.

See what incident made police especially scared of problems after the jump.

The most highly anticipated moment of the day was when Kate Middleton finally revealed her wedding dress.

A custom made ivory gown designed by Sarah Burton for Alexander McQueen, which echoed Grace Kelly's classic lace gown.

Wedding dress designer to the stars, Vera Wang, who designed custom gowns for Jennifer Lopez and Jessica Simpson, called the gown "an emotional statement."

"She's made her very own strong personal statement as to who she really is, it's that she is really her own person, that she has a sense of her own elegance and what is appropriate," Wang said. "She's showing the world that she's not here to only dress for fashion, she's here to dress for herself in a very elegant and dignified manner and I think that says volumes about who she is and the task that lies ahead for her.

Wang's favorite part? The veil!

"She wore such a simple veil over such a beautiful dress in its classicism," Wang said. Of course, it the "simplicity" of the veil was topped off by a "halo" tiara lent to Middleton by the Queen herself!

Kate Middleton's maid of honor and younger sister, Pippa, wore white for the royal wedding today.

Were you as confused as us? Isn't wearing white at someone else's wedding a total fashion faux pas?

Turns out, British traditions are different than American ones. An old superstition says that bridesmaids and groomsmen should dress similarly to the bride and groom to ward off evil spirits.

And Brits have set traditions with white at weddings in more ways than one; Queen Victoria was the one who first popularized wearing a white wedding dress when she got married in 1840.

Before that, brides just wore their best dress for the ceremony.

So, we have her to thank for the pricey gowns and endless hours of shopping and flipping through Modern Bride. Thanks, Queen. If it weren't for you, we could have just gone to Forever21.

See who designed Pippa's dress after the jump!