Today in Tweet Beat, La Toya Jackson managed to get photo ops with a number of different celebrities she ran into today. Plus, Cher hates the Tea Party.

Hack? Hoax? Apparently a message was posted to Rihanna's Twitter feed reading, "I admit, I provoked Chris to hit me. It was not entirely his fault. #ImSORRY." The message has since been deleted, but a screenshot has been going around. Are some losers fucking around or is this really happening? [Bossip]

[Los Angeles, May 23. Image via Bauer-Griffin.]

This morning, Meredith Vieira announced that she is indeed leaving the Today show in June (as rumored). "I want to spend more [time] with my husband Richard, and my kids," she said. Her husband has written a book about the fact that he's coping with multiple sclerosis and colon cancer. Meredith also said: "I really…

[Click to enlarge. New York, May 5. Image via INFDaily.]

What could bring together Christina Hendricks, Dita Von Teese, Kristin Davis and, um, Marilyn Manson? Why, Vivienne Westwood, of course! Specifically, the opening of her Los Angeles store. And naturally, the clothes were noteworthy.

Today in Tweet Beat, celebs mourn the loss of Elizabeth Taylor and share personal photos of the late actress.

Today in Tweet Beat, Katy Perry is blaming the tabloid media for comments she made about product placement in Britney Spears' video "Hold it Against Me." Also, Cher is pissed about Burlesque number getting cut from Oscars opening.

Today in Tweet Beat, Dita Von Teese shows off her custom-made Louboutins. Plus, Justin Bieber ponders changing his famous hair.

[You know how, when you're flying somewhere, you wake up super early, decide to skip the shower even though you need one, because then your hair might be damp on the plane and you're just going to wear a t-shirt and yoga pants anyway, who cares? Dita doesn't relate to that. LAX, February 13. Image via Bauer-Griffin.]

The Heart Truth fashion show — at which celebs don red dresses for women's heart health — is always fun to watch, sort of like a mega-wedding where every bridesmaid gets to choose her own dress. And this was the best one yet.

[Baptiste, aspiring dance music star and Karl Lagerfeld's muse, is the clear winner. Sorry Dita! Cologne, Germany, January 30. Image via WENN.]

Today in Tweet Beat, Ivanka Trump shares her big news. Also, it's Friday, which means it's Turtle Time.

• Dita Von Teese has a guest role on CSI, and was asked to wear less-revealing clothing to play a school teacher turned nightclub dancer.

• Pioneering knitwear designer Joan Vass, who outfitted Ali MacGraw, Jacqueline Kennedy Onassis, and Candice Bergen, has died in Manhattan. Vass majored in philosophy at University of Wisconsin-Madison, and was notorious as a fashion industry provocateur. Recalls her son Jason:

• Chanel is apparently turning the Musée D'Orsay in Paris into a giant, sparkly, 2,890 square foot billboard for No. 5 perfume. We hope the museum is being rewarded handsomely for its services as a host for corporate messaging. [WWD]

Today in Tweet Beat, Beth Chapman can't have anything nice. Plus, The Real Housewives of New York are back together and armed with lots of bras.

• American sweetheart Reese Witherspoon has just plunked down $7 million to buy real-life action figure Steven Seagal's sprawling Brentwood home. It's got nine bathrooms, seven bedrooms, a swimmin' pool, and a Buddhist temple where Seagal liked to meditate.

• Katy Perry, shot by Alexi Lubomirski for the subscriber cover of the new Harper's Bazaar, looks gorgeous, if a bit crusty-lipped. She also looks a lot like Jean Patchett on the iconic Erwin Blumenfeld Vogue cover from January, 1950. [JustJared]