Michaele and Tareq Salahi — the couple that allegedly crashed the White House — will enter the next season of “Celebrity Rehab” ... along with one of the greatest NY Mets players of all time ... TMZ has learned  —  Sources connected to the production tell us ... Dr. Drew will have one hell of a cast for Season 5 ... including:

BRITNEY FOREVER  —  Britney Spears, the sweetest girl who ever emerged from McComb, Mississippi, is once again on a mission to make us dance.  This spring, the greatest pop star of our generation returns with Femme Fatale, a suite of hits destined for good times, late nights, and heavy clubland rotation.

Scarlett Johansson & Sean Penn Take Whirlwind Trip to Mexico  —  It was a short getaway, but Sean Penn and Scarlett Johansson made the most of it.  —  The pair left on a private jet from Van Nuys airport Tuesday morning, then were spotted having dinner in Cabo San Lucas, Mexico, that night, according to sources.

Charlie Sheen: I Twitter for Cash!  —  Charlie Sheen told TMZ ... the reason he's taken up Twitter is simple — it's a “cash cow.”  —  Sheen told us ... his primary motivation behind the new ramblings is that he can score a fortune through advertising.  To give this some context …

Brooke Claims Charlie Sheen Sent Anti-Semitic Text  —  Brooke Mueller claims Charlie Sheen recently sent her a scathing, anti-Semitic text about his manager, saying “I must execute mark b [Mark Burg] like the stoopid jew pig that he is.”  —  Sources say Charlie sent the text last week, after firing Mark ... but before rehiring him.

WORLD PREMIERE: Listen to Kim Kardashian's Debut Single “Jam” [AUDIO]  —  Kim Kardashian joined us in studio with sister Kourtney Kardashian to premiere her single “Jam” Wednesday morning on “On Air with Ryan Seacrest” as well as dish about current boyfriend and Nets player, Kris Humphries.

‘Hunger Games’ search heats up with Lawrence  —  Jennifer Lawrence, Hailee Steinfeld, Abigail Breslin vie for lead … With the Oscars over, two of this year's up-and-coming nominees are being considered for the hottest female role available at the moment: the lead in “Hunger Games.”

Whitney Houston and Bobby Brown's daughter photographed snorting coke  —  The National Enquirer is set to publish a big spread in the upcoming issue featuring Whitney Houston and Bobby Brown's daughter Bobbi Kristina, 17, doing lines of cocaine.  The website Hello Beautiful has a preview of that issue, which is out this week.

Jay-Z Worried About Rihanna's Deteriorating Health Due to Punishing Schedule  —  When Rihanna performed at the NBA All-Star Game last month, it was apparent her typically stellar vocals were a bit on the weak side, as the singer was reportedly suffering from a bout with bronchitis.

Serena Williams Speaks Out on ‘Scary’ Health Woes  —  Serena Williams was recently treated for a frightening pulmonary embolism, but the tennis ace is home now and says she's “doing better.”  —  Still, she says, it's been a tough week.  After the embolism, she had also sought emergency treatment for a hematoma on Monday.

Gotta Hand It To Zac  —  National Enquirer (March 14, 2011) claims Zac Efron has been spotted hand-holding with a dude at an NBA party at the W in L.A. on February 18: … The article claims that “Zanessa” are clearly not together, but are clearly still friendly.  —  Full article after the jump...

Warner Bros Sets Diane Lane For Superman's Adopted Mother, Martha Kent  —  Warner Bros. Pictures and Legendary Pictures announced today that Oscar®-nominated actress Diane Lane will play Martha Kent, the only mother Clark Kent has ever known, in the new Superman movie to be directed by Zack Snyder.

Official: Christina Aguilera joins NBC's ‘The Voice’  —  Christina Aguilera is coming to NBC.  —  The five-time Grammy winner has signed on as a coach/judge on Mark Burnett's singing competition series The Voice.  —  Celebrity singers fill three spots on the judging panel so far, with Xtina joining Cee Lo Green and Adam Levine.

Jessica Simpson Is a ‘Frontrunner’ to Judge The X Factor  —  Although buzz about which celebrities could join Simon Cowell's new show The X Factor is already going strong, a new name has been added to the mix.  Jessica Simpson is a frontrunner to become one of the judges alongside Cowell, a show insider tells PEOPLE.

The Official Royal Wedding Web Site Is Launched  —  Start clicking: Prince William and fiancée Kate Middleton are set to reveal details of the bride-to-be's wedding dress on their newly launched Web site, which aims to celebrate all aspects of their upcoming nuptials.

Selena Gomez Didn't Get Punched By a Justin Bieber Fan, Says Rep  —  Selena Gomez has received online threats from fans who adore her boyfriend, Justin Bieber, but have haters taken things a step further?  —  Rumors started on Twitter Wednesday that Gomez, 18, had been punched by a fan …

Snooki Discusses Smushing and the Stress of ‘Jersey Shore’ in Rolling Stone Cover Story  —  'We can't have cellphones, TV, radio or the Internet.  There's no normalcy.  It's just like prison, with cameras'  —  By  —  Watch video of Snooki's Rolling Stone cover shoot with Mark Seliger below.

Keith Richards' Fashion Model Daughter — ARRESTED  —  Keith Richards' 25-year-old daughter was arrested last night — after the famous fashion model allegedly defaced public property ... while in possession of marijuana and a controlled substance ... TMZ has learned.

Ken Starr, accountant to the stars, sentenced to 7 1/2 years for $30 million Ponzi scheme  —  Crooked accountant Ken Starr, whose clients once included actress Uma Thurman and Oscar-winner Natalie Portman, was sentenced Wednesday to 71/2 years in prison for a $30 million Ponzi scam.

Soon To Be Ex-Husband Pete Wentz Went Shopping With A Mystery Woman - Pics  —  Pete Wentz certainly doesn't waste any time.  He's not even officially divorced from Ashlee Simpson yet and he's already been seen out with another woman.  The two were shopping in Los Angeles and Pete bought a picture frame.