Biographer: Oprah's ‘family secret’ is half-sister she never met before  —  Oprah Winfrey is calling it “the miracle of all miracles” and “news that literally shook me to my core.”  On Monday's show, according to her unauthorized biographer, the world will be introduced to the half-sister Oprah never knew she had.

DWTS' Aaron Carter Enters Rehab  —  The 23-year-old former Dancing With the Stars contestant checked into a private Southern California facility earlier this month, says the source  —  The source reveals that Carter's choice to go to rehab was his move to “finally get help” and not a court-mandated decision.

Jack LaLanne, Founder of Modern Fitness Movement, Dies at 96  —  Jack LaLanne, whose obsession with grueling workouts and good nutrition, complemented by a salesman's gift, brought him recognition as the founder of the modern physical fitness movement, died Sunday afternoon at his home in Morro Bay, Calif. He was 96.

Britney Spears Returning to ‘Edgy’ Sound on New Album  —  While Britney Spears's new single, “Hold It Against Me,” may have provided an upbeat preview of her new album, what will the rest of the work sound like?  —  “It's way more edgy than the last album,” songwriter Claude Kelly …

Jewel and Ty Murray: We're Having a Boy!  —  Jewel and Ty Murray can finally start painting their nursery.  —  “We would have been happy either way, of course, but we are so excited to be having a little boy,” the singer, 36, tells PEOPLE.  —  The couple, who are expecting their first child this summer …

Elisabetta Canalis Learns on CNN She'll Never Be Mrs. Clooney  —  When George Clooney sat down for an interview with CNN's Piers Morgan, he made it clear to the world that he doesn't want to get married again.  Too bad he forgot to mention this to longtime girlfriend, Elisabetta Canalis.

Tiffany Outs ‘NKOTB’ Member Jonathan Knight  —  Rumors have surfaced in the past regarding ‘New Kids on the Block member’ Jonathan Knight's sexuality, but the pop performer has never admitted to being gay.  —  However, '80s teen queen Tiffany told millions of TV viewers last Thursday that Knight indeed is gay.

Lindsay Lohan — I'm Done Clubbing!  (Seriously)  —  Stop us if you heard this one before — Lindsay Lohan is telling her friends she is never clubbing again.  As in forever.  Forever ever.  For reals.  Stop laughing.  —  Sources close to LiLo tell TMZ she is “completely over the club scene” …

EXCLUSIVE INTERVIEW: Madonna's Fascination With Young Boyfriends Is ‘Creepy,’ Says Brother Christopher Ciccone  —  Madonna's brother Christopher Ciccone has admitted that his superstar sister's obsession with younger men is in danger of becoming “creepy”, RadarOnline.com is exclusively reporting.

Kate Hudson Heads to London With Her Baby Bump and Boyfriend  —  Kate Hudson arrived at London's Heathrow airport this morning with her boyfriend Matthew Bellamy.  The duo have been out of the spotlight since Christmas, when they joined her family for a holiday vacation in Aspen.

James Cameron: ‘Avatar’ sequels coming Christmas 2014 and 2015  —  James Cameron has spoken frequently about his intention to turn his mega-hit Avatar into a trilogy.  Now, according to the director himself, those two sequels have release dates.  Cameron tells EW, “I am in the process of writing the next two Avatar films now.

Elizabeth Olsen Makes Her Sundance Debut  —  When one mentions an “Olsen,” people immediately assume it's either Mary-Kate or Ashley.  But it's the famous twins' younger sister, Elizabeth Olsen, who's making headlines now.  —  Olsen, 21, is currently taking time off from her studies at NYU …