In today's Tweet Beat, Shia LaBeouf is still not famous, Emma Bunton delivers a non-Thursday throwback, and musicians like Beth Ditto and Sir Mix-A-Lot applaud Lorde's Grammy wins.

For your latest installment of the Troubled Hollywood Families Variety Programme, Rumer, Scout and Tallulah (23, 20 and 18 respectively) have cut off all ties from their mom Demi Moore, whose emotional breakdowns in the wake of her split with Ashton Kutcher became too overwhelming for the kids to handle. Since Moore…

• David Cassidy was arrested last night in Florida and charged with DUI. Police found a half empty bottle of bourbon in his car, and say he almost hit another vehicle.

[London, March 20. Image via Bauer-Griffin.]

[London, September 16. Image via Bauer-Griffin.]

• Did L.A. boutique Maxfield drop Victoria Beckham's dVb in favor of Holmes & Yang? Posh's people say Maxfield hasn't ordered the line for three seasons, and the decision had nothing to do with Katie Holmes, who is Posh's friend. [P6]

• Michelle Obama and "first tweens" Malia and Sasha skipped the health care talk President Obama gave on ABC last night and went to a Beyoncé concert instead.

• Lindsay Lohan had a "meltdown" in a club in London, which involved saying:

• Has the fighting between Jennifer Lopez and Marc Anthony has turned physical? Yes, according to Star.

[Los Angeles, April 27; image via INFdaily.com.]

What does "Girl Power" really mean to the Spice Girls? Mocking the girl without a man, naturally. During a break while taping a BBC-1 special, Geri "Ginger" Halliwell's single status was the object of their disaffection: "Are there any good-looking single blokes for Geri? We have to get her a boyfriend," said Melanie…

Spice down! Baby busted her ankle at a show in Vegas Tuesday night. Don't worry, ticket holders, Baby will soldier on through upcoming performances. What a trouper! • Mischa Barton is keeping busy by posing in her skivvies for Maxim. The jizz-stained pages of men's magazines are the last refuge for an ailing career.…

• Britney Spears missed her deposition yesterday because she was freaking the fuck out. Her "friend" Sam Lufti said, "She's sick, both physically and high anxiety. Millions of press outside. It's too much." And yet she makes it to Starbucks. [People]
  
• And Brit may call in sick again, says a source. She doesn't think it's…

• 24 star Kiefer Sutherland is in the slammer! The actor will serve 48 days in Glendale City Jail for his DUI conviction, which means he'll be there for his birthday, Christmas and New Year's Eve. Keep your head up, Kiefer! [TMZ]
  
• Also booked on DUI charges, with the LAPD: Vivica A. Fox. She was at the police station for…

As has been breathlessly reported (at least in the British press) the Spice Girls reunion tour has begun, and Jesus fucking Christ: It looks fierce! (Cavalli-designed costumes, however? The man should be jailed for crimes against humanity.) But do the music reviewers agree? After the jump, a roundup of critics'…