Kim Kardashian Disses Sisters With ‘Immature’ Tweet  —  kim-kris-ftr-FFN_Kardashian_Out_KET_ 042312_9009136  —  Kris Jenner's alleged ‘favorite daughter’ hacked her mother's Twitter account just to annoy her sisters!  —  A tweet was posted from Kris Jenner's account, reading …

Justin Bieber — Photog Beatdown Going to Prosecutors  —  Photog Beatdown  —  Going to Prosecutors  —  EXCLUSIVE  —  Justin Bieber's brawl with a photog over the weekend isn't going to just disappear ... TMZ has learned the case WILL be referred to the L.A. County D.A. for possible criminal prosecution.

Prince William: I'm “Very Sad” Princess Diana Never Got to Meet Kate Middleton  —  On what should have been the happiest day of his life, Prince William was plagued by memories of the saddest: the day his mother, Princess Diana, was killed in a car crash in August 1997.

Phillip Phillips Surgery POSTPONED  —  Surgery POSTPONED  —  EXCLUSIVE  —  Phillip Phillips will NOT have kidney surgery today as scheduled, because he's burning up with a fever ... TMZ has learned.  —  As we first reported, Phillip has a serious congenital kidney condition that produces kidney stones so large they cannot pass.

Keira Knightley's Engagement Ring: How Much It Costs!  —  Right on, James Righton!  —  When choosing an engagement ring for Keira Knightley, Righton selected a stunning yet classic style.  The Klaxons rocker, 28, and the Oscar-nominated actress, 27, confirmed their engagement Friday …

Jessica Biel: Married Life with Justin Timberlake Won't Change a Thing  —  She's played everything from a distressed publicist to a noblewoman on the big screen, and now Jessica Biel is looking at a completely new role in real life: housewife.  —  “To me, nothing will really change …

Lindsay Lohan Was On Drugs While Filming SNL, Says Michael Lohan As If No One Could've Guessed  —  Michael Lohan recently enjoyed a temporary reprieve and was allowed to suckle off the somehow lucrative Lindsay Lohan teat for as long as he could keep his mouth shut and not go blabbing to the press about her drug problems.

Francesca Eastwood — DEATH THREATS After Destroying Birkin Bag  —  DEATH THREATS After Destroying Birkin Bag  —  EXCLUSIVE  —  Clint Eastwood's daughter has been bombarded with vicious online death threats after she publicly demolished a $100,000 Birkin bag in the name of art, TMZ has learned.

Kate Joins the Queen - and 8,000 Others - for Tea  —  The Duchess of Cambridge navigated another royal first Tuesday when she joined Queen Elizabeth - and 8,000 other people - at a garden tea party at Buckingham Palace.  —  Under sunny skies and an uncharacteristically warm 77 degrees …

Britney Spears vs. Jennifer Lopez — It's All About Money  —  Jennifer Lopez helped Britney Spears secure a $15 million paycheck for “X Factor” — because Britney had one intractable demand ... she had to make more than J Lo did for her first season on “American Idol.”

CHARLIZE THERON AND KRISTEN STEWART … Interestingly enough, there is one way in which Charlize Theron has less experience than Kristen Stewart.  With the Twilight experience behind her—Twilight (2008), New Moon (2009), Eclipse (2010), Breaking Dawn-Part 1 (2011), and this year's Breaking Dawn-Part 2 …

Rich artist Kim's new love  —  Kim Cattrall, best known for her role as sex-crazed Samantha on “Sex and the City,” is dating wealthy artist Clifford Ross, sources tell Page Six.  —  Ross is a visual artist whose landscape and wave photos are housed in several New York museums including the Metropolitan, the Whitney and the Guggenheim.