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.

It's a Boy for Alicia Silverstone  —  Alicia Silverstone is a mom!  —  The actress and author, 34, welcomed her first child with husband Christopher Jarecki on Thursday, her rep tells PEOPLE exclusively.  —  Son Bear Blu Jarecki weighed in at 7 lbs., 15 oz.

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 …

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 …

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 …

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.

Dexter Exclusive: Colin Hanks Joins Cast... as Dex's New Archenemy?  —  Colin Hanks has landed a role most actors would kill for.  —  Sources confirm to TVLine exclusively that the Mad Men alum is joining the cast of Dexter for a major Season 6 arc.  —  Like with most of the Showtime's …

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.

Chelsea Handler lied and convinced coworker to leave honeymoon early  —  Visit msnbc.com for breaking news, world news, and news about the economy  —  Chelsea Handler was on the Today Show today to promote her new book, Lies That Chelsea Handler Told Me, which is out tomorrow.

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.

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.

Heidi Klum Renews Vows, Shows Off Bikini Bod [Photo]  —  Heidi Klum had a busy Mother's Day weekend, and turned many heads showing off her hot body.  —  The super model stepped out in a snake skin print bikini on the beaches of Palm Beach, Florida after she and husband Seal renewed their vows over the weekend.

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.

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.

Ralph Macchio Battling ‘Serious Pain’ Due to Ruptured Cyst  —  It looks like Ralph Macchio may have to head back to grammar school and park it on the bleachers in lieu of tonight's ‘Dancing with the Stars’ performance.  The original karate kid, 49, is suffering from a ruptured cyst …

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.

‘Glee’ Season Finale to Feature Matthew Morrison Track (Exclusive) … Glee star Matthew Morrison will sing “Still Got Tonight,” the single from his self-titled album (out Tuesday), as part of the show's New York-themed Season 2 finale, The Hollywood Reporter has learned exclusively.

Michael Stipe ‘Lost His Mind’ As He Battled Bulimia  —  Rem frontman Michael Stipe became so ill as he battled bulimia, he thought he was suffering from AIDS.  —  The singer experienced a breakdown after the band shot to fame in the 1980s and spent a year in the grip of the eating disorder.