Exclusive: Justin Timberlake, Jessica Biel's Wedding: Ring, Dress and Date Details!  —  Don't count on a long engagement for Justin Timberlake and Jessica Biel.  —  After nearly five on-and-off (and sometimes rocky!) years together, the recently engaged twosome plan to tie the knot later this year, an insider tells Us Weekly.

In Rehab  —  Gerard Butler is being treated for substance abuse at the Betty Ford Center ... TMZ has learned.  —  Butler's problems were triggered by the physical demands of shooting “300” in 2006.  We're told the actor began struggling with pain management, and the problem became exacerbated while filming …

Renowned Physicist Stephen Hawking Frequents Sex Clubs  —  Mark this in your book of bizarre celebrity sightings.  —  Renowned physicist Stephen Hawking is somewhat of a regular at a Devore, California sex club, RadarOnline.com is exclusively reporting.  —  According to a source …

Sacha Baron Cohen “Upset” He Can't Attend Oscars in Costume  —  No fun!  —  As reported Thursday, Sacha Baron Cohen is still a welcome guest at Sunday's Academy Awards — just not as the General, the despotic ruler he plays in upcoming comedy The Dictator.  —  PHOTOS: Oscar nominees' awkward past roles

Chris Brown & Rihanna Reuniting on American Idol?!  —  Jason Merritt/Getty Images; John Shearer/WireImage  —  American Idol producers are in talks with Chris Brown and Rihanna about possibly performing together on the show this season, a source close to the situation exclusively tells E! News.

TWITTER LOOP: TYRA BANKS GRADUATES FROM HARVARD BUSINESS SCHOOL  —  After attending Harvard Business School, model/former television Tyra Banks has finally graduated from the Ivy League school's Owner/President Management Program, a three-year, three-week increment program that helps successful entrepreneurs …

Paris Hilton's “Drunk Text” Music Video: You Gotta See (And Hear) It to Believe It!  —  If you were one of the many music fans whose listening sensibilities were seriously affronted by Paris Hilton's first stab at a singing career, fear not.  —  Because while the heiress does a lot of things …

Dancing With the Stars Wants Giuliana Rancic: Will She Go for It?!  —  We were wondering when the Dancing With the Stars casting ideas would start pouring in!  —  Around this time every year, the rumors start as to which celebrities would love to do the show and who ABC would really love to have onboard.

New ‘Avengers’ Images: Superheroes United & Angry Hulk … Marvel has already hooked steadfast comic book fans to go and see Joss Whedon's The Avengers when it hits theaters this May.  Of course, that doesn't mean the studio is planning to slow down on the promotional campaign …

Dr. Conrad Murray Denied Freedom During Manslaughter Appeal  —  DR. CONRAD MURRAY  —  Denied Freedom  —  During Manslaughter Appeal  —  Dr. Conrad Murray was just shot down by a judge, denying him bail while he appeals his manslaughter conviction in the death of Michael Jackson.

Justin Bieber Has Issues with Beavers  —  Has Issues With Beavers  —  Justin Bieber is pissed over a Beaver ... TMZ has learned.  —  Let us explain.  A company called RC3 has created a mobile app called Joustin' Beaver.  The app is a cartoon game, in which the user floats down a river, defending Joustin' from the phot-hogs.

Chris Brown — Accused of Drive-By Phone Robbery  —  Accused of Drive-By  —  Phone Robbery  —  Chris Brown has been accused of angrily snatching some girl's iPhone outside a nightclub in Miami this weekend ... and driving off with it — law enforcement tells TMZ.

KIM KARDASHIAN SPORTS HAREM CHIC  —  Kim Kardashian rocked a drapy, Harem-style skirt and strappy black platforms while heading to the nail salon in Beverly Hills.  —  The curvy 31-year-old reality star put so much effort into getting her wardrobe together that she forgot to do her hair!

National Enquirer casket photo: Whitney Houston funeral home reacts  —  A gold hearse carrying Whitney Houston's body leaves Whigham Funeral Home in Newark, N.J. on Feb. 18, heading for the funeral at nearby New Hope Baptist Church.  (Peter Foley / EPA)  —  The National Enquirer's photo …