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.

X17 EXCLUSIVE - Alicia Silverstone Gives Birth To Baby Boy, Bear Blu  —  UPDATE - Alicia's rep confirms what X17 reported first — the baby has arrived!  Silverstone gave birth to son Bear Blu Jarecki, 7 lbs., 15 oz., on Thursday.  Alicia Silverstone had the best Mother's Day weekend ever ... thanks to the birth of her new baby!

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 …

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 …

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 …

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.

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.

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.

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.

At least she wore nipple tape  —  Lady Gaga promoting her new album in Mexico City, Mexico (5/6)  —  As if the threat of violent death at the hands of drug lords wasn't bad enough for Mexicans, Lady Gaga wore that Friday while promoting her new album in Mexico City.

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.

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.

‘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.

NeNe Leakes: Why I Quit Celebrity Apprentice  —  See ya, NeNe!  —  Real Housewives of Atlanta's NeNe Leakes made a quick getaway on Sunday's Celebrity Apprentice, but she didn't get to hear Donald Trump utter his famous phrase “you're fired!”  Instead, the reality star bolted on her own accord …