Exclusive: Leo & Bar split  —  Leonardo DiCaprio and model Bar Refaeli have officially called it quits, Page Six has exclusively learned.  The pair broke up late last week after going through a rough patch.  “It was amicable, they're still friends and they are still talking,” said a source close to the couple.

Hayden Panettiere and Wladimir Klitschko End Their Romance  —  Hayden Panettiere and Wladimir Klitschko  —  After two years of dating, Hayden Panettiere and Ukrainian heavyweight boxing champion Wladmir Klitschko are calling it quits, PEOPLE has learned exclusively.

Lady Gaga's Heels Get the Shaft from ‘American Idol’  —  Last night fans got to watch Lady Gaga mentor the “American Idol” contestants, but one thing they didn't see ... her clear plastic penis heels.  —  When Gaga appeared on the show, producers smacked an “Idol” logo over her sexually explicit stilettos …

Celebrity Herpes Lawsuit Triggers Sex Tape Frenzy  —  TMZ has learned ... the person who is suing an internationally famous celebrity for intentionally transmitting herpes has multiple videos of the sex acts that allegedly transmitted the disease — and now there's a bidding war for the tapes.

EXCLUSIVE: Jennifer Aniston May Go Topless in Horrible Bosses  —  After years of posing naked — but playfully concealing her breasts — Jennifer Aniston, 42, may finally flash her assets in the raunchy comedy Horrible Bosses.  —  “She shot a topless scene, but produces aren't sure if they'll use it …

Jon Gosselin Opens Up About Real Life: This Is My Last Interview  —  Once upon a time, Jon Gosselin was just a regular dad, struggling to raise eight kids with his wife, Kate, in suburban Pennsylvania.  And then the camera crew arrived.  But almost two years after he was dropped from the show …

Mom Gives Botox to 8-Year-Old Daughter: How Young Is Too Young?  —  Botox injections and leg waxing on an 8-year-old girl, all in the name of beauty pageant success, all done by her own mom.  —  It sounds too unreal to be true, like a storyline straight out of “When Stage Moms Go Bad.”  —  It's not.

Tom Sizemore — Questioned by Cops Over Missing GF  —  about a minute ago by TMZ Staff  —  Tom Sizemore's girlfriend went missing over a month ago — and TMZ has learned, the actor was recently questioned in connection with the case.  —  Law enforcement sources tell TMZ …

Jessica Alba in a Bikini (Warning: May Contain Pregnancy)  —  Here's an extremely pregnant Jessica Alba vacationing in Mexico yesterday demonstrating just how cheap Cash Warren is.  Dude, if you wanted your wife to have bigger breasts, decent implants are, what?  Ten grand?

Britney Spears Shows Southern Hospitality as Host of Charity Dinner  —  It's not too often that Britney Spears hits the red carpet these days, but the singer stepped out with boyfriend Jason Trawick Wednesday night when she hosted a charity dinner in Beverly Hills.

Mary Tyler Moore Set for Brain Surgery  —  Mary Tyler Moore and Dick Van Dyke, on the set of the Rachael Ray Show, May 5, 2011  —  Mary Tyler Moore has elected to undergo surgery to remove a meningioma, a benign tumor of the lining tissue of the brain, her rep tells PEOPLE exclusively.

Teen Mom 2's Jenelle Evans Enters Rehab  —  Teen Mom 2 star Jenelle Evans has entered a rehab program in Malibu, a source confirms to Us Weekly.  —  “She is clean right now and has been that way for several weeks,” the insider says.  “She's doing this program to help her cope with all the stress …

Sebastian Bach Arrested for MARIJUANA Possession  —  For the second time in 6 months ... former Skid Row frontman Sebastian Bach has been arrested for weed — this time, Bach was popped for marijuana possession in New Jersey.  —  TMZ has confirmed ... Bach was pulled over for “failing to keep right” …

The Situation Wouldn't Pay His Dad's Medical Bills  —  He will, however, lift up his shirt with the charisma of a day-shift stripper.  Close enough.  —  Yesterday, videos featuring The Situation's dad Frank Sorrentino finally came to people's attention after a week of sitting on YouTube …

Will Smith forced to move giant trailer as he cracks up at controversy  —  He may be the Fresh Prince of Bel-Air, but this is Bloomberg's kingdom.  —  At the command of Hizzoner — and amid intense pressure from furious residents — egomaniac actor Will Smith begrudgingly moved …

Real Housewives of Orange County's Alexis Bellino Reveals Eating Disorder: “It's Not a Pretty Disease”  —  Alexis Bellino is sharing a dark secret.  —  “I suffered from both anorexia and bulimia,” the svelte star of The Real Housewives of Orange County told us yesterday.

A Second Shot to Have the Best Night of Their Lives  —  GREEN BAY, Wis. — The last time Ashley Moeller shimmied into a satin dress and glittering high heels for the prom, her father issued a stern warning: be home by 11 p.m. sharp.  He waited at the door, careful to smell her breath for even the slightest trace of alcohol.

This Week's Cover: The stars of ‘The Hangover Part II’ share wild tales from the set  —  Having delivered the craziest morning-after in cinematic history with 2009′s The Hangover, the team behind the Hangover Part II knew they needed to up the ante for the sequel.

Fox's ‘Breaking In’ To Get Another Chance?  —  Can Breaking In come back from the dead a second time?  Well, it is possible.  I hear that Fox may reconsider the bombshell Tuesday night cancellation of the midseason comedy starring Christian Slater.  Fox is in discussions with Breaking …

Nick Cannon Dishes on Mariah, New Twins, and First Comedy Special  —  Nick Cannon is still getting used to being a tabloid headline all the time: First for his much-publicized marriage to singer Mariah Carey, 10 years his senior; then for expecting babies for what felt like an eternity …