Whitney Houston In Out-Patient Rehab Program  —  Whitney Houston has checked herself in to an out-patient rehabilitation program ... but it's not for drugs or alcohol ... TMZ has learned.  —  A source directly connected with Whitney tells us ... Houston enrolled in the program around 10 days ago.

Bieber — Helgenberger's Comments Are ‘Kinda Lame’  —  Justin Bieber seems to be pretty SHOCKED that “CSI” star Marg Helgenberger told a radio show he was a “brat” on the set ... especially because they never actually worked together.  —  Bieber just went to his Twitter page and without mentioning Marg …

Vieira will step down after nearly 5 years, but will continue in a new role at NBC News  —  Below:  —  TODAY.com  —  After nearly five years as co-anchor of TODAY, Meredith Vieira has decided to leave the show in June.  Ann Curry will take her place as co-anchor of America's No. 1 morning show alongside Matt Lauer.

X17 EXCLUSIVE - Alicia Silverstone Gives Birth, Source Says  —  Alicia Silverstone had the best Mother's Day weekend ever ... thanks to the birth of her new baby!  X17online can report exclusively that Silverstone had a water birth at an LA-area birthing center on Friday.

PHOTOS: Pippa Middleton Flaunts Hot Bikini Body  —  What happens in Ibiza doesn't always stay in Ibiza.  —  Suddenly world-famous royal bridesmaid Pippa Middleton caused a web sensation last week with the release of an old photo in which Duchess Kate's sister, 27, danced in a bra with a half-naked male pal.

So what were Prince Harry and Charlize Theron chuckling about?  —  His usual blonde companion is on-off girlfriend Chelsy Davy.  —  Yesterday Prince Harry appeared to have found a stand-in at the polo field, in the form of Oscar-winning actress Charlize Theron.

‘X Factor’ Brutality at Auditions: ‘L.A.’ Reid Meaner Than Simon Cowell; Audience Urged Not to Boo … Simon Cowell is known for his harsh criticism of aspiring singers on American Idol, but it seems he might have competition for the title of “meanest judge” on The X Factor in music industry veteran and table-mate Antonio “L.A.” Reid.

Lindsay Looks Fangtastic At LA Art Exhibit  —  Getty Lindsay Lohan is ready to sink her teeth into any opportunity before she heads back to court for her felony grand theft case.  The 24-year-old starlet attended an art exhibit in East Los Angeles for friend and celebrity photographer Tyler Shields.

EXCLUSIVE: Rachel McAdams Flashes Engagement Ring  —  Here comes another Hollywood bride and groom: Rachel McAdams and Michael Sheen?  —  In an exclusive Us Weekly photo, the Morning Glory actress, 32, showed off a brand-new ring on her wedding finger while out and about in L.A. on Sunday.

Bristol Palin Moving In with Kyle Massey for Reality Show  —  Fresh off speculation that she's had plastic surgery, Bristol Palin is now getting ready to face the cameras again  —  Sarah Palin's 20-year-old daughter is moving back to Los Angeles with her son Tripp, 2, to live …

Jessica Simpson Isn't Wearing Any Pants  —  Here's a pantsless Jessica Simpson on a photo shoot in Beverly Hills Saturday where she apparently posed with her sister Ashlee and nephew Bronx Mowgli.  Because if there's one things children love, it's carelessly exposed vaginas.

Heartbreak for ‘devastated’ Kelly Brook as she loses baby girl at nearly five months  —  Kelly Brook has been left ‘devastated’ after losing the baby girl she was expecting with her boyfriend Thom Evans.  —  The striking model, 31, who was nearly five months pregnant, was rushed to hospital …

See the $650,000 Engagement Ring Paul McCartney Bought His Fiancee!  —  Paul McCartney spared no expense when the time came to buy an engagement ring for Nancy Shevell, his love of nearly four years.  —  The former Beatle, 68, proposed to NYC businesswoman Shevell, 51, two weekends ago …

BRUCE & DEMI DAUGHTER WAR  —  The love fest between ex-spouses BRUCE WILLIS and DEMI MOORE has ended as the superstars battle over naughty behavior of their daughter.  —  The ENQUIRER has learned that Bruce and Demi are at odds over their 17 year old daughter TALLULAH WILLIS who was recently busted for underage drinking.