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.

‘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.

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.

Lindsay Lohan Poses as a Vampire in L.A. Art Show  —  Lindsay Lohan has a new gig - and she bared her fangs for it.  —  The starlet attended photographer pal Tyler Shields's exhibit, “Life Is Not A Fairytale,” Saturday night in a warehouse in East Los Angeles for the unveiling of several artful shots in which she portrays a vampire.

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 …

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 …

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 …

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.