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.

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 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.

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.

‘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 …

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.

Michael Bolton Teams Up With The Lonely Island!  —  Awww yeah, suckaz!  Michael Bolton and the Lonely Island bring you the sexiest, most HIGHlarious club track of the year!  —  Check out the video above to see the legendary collaboration, and listen to the “big, sexy, hook” that Michael has written for the crew!

John Walker Dies  —  John Walker, one of the founders of the '60s music group the Walker Brothers, died in his Los Angeles home Saturday after a battle with liver cancer, it was announced on his Web site.  He was 67.  —  A songwriter, vocalist and guitarist, Walker, along with Scott Engel and Gary Leeds …