Paparazzi Photo

Michelle Rodriguez is rebounding just fine from her supermodel ex-GF -- just ask Zac Efron's mouth ... which got all up in Michelle's grill during their Italian vacation.

35-year-old Michelle was spotted sucking face with the 26-year-old "Neighbors" star off Sardinia while aboard a yacht owned by of one of Zac's multi-millionaire pals.

You could say Michelle -- who's been open about her bisexuality -- is getting a little revenge. Last month, her ex Cara Delevingne was making out with model Karlie Kloss.

Leonardo DiCaprio can't handle the truth ... he's really starting to look like Jack Nicholson.

The 39-year-old actor resurfaced in Malibu with girlfriend Toni Garrn Sunday ... bearing a striking resemblance to his co-star from "The Departed."

All work and no play makes Leo a dull boy.

Cameron Diaz and rocker Benji Madden frolicked around on the beach in Florida this holiday weekend, canoodling in the ocean for all the world to see.

Our photogs spotted the new couple at LAX last week as they departed for their vacay together ... a sure sign things are getting serious between them. Or she's just finding a creative way to push her new movie "Sex Tape."

Jessica Simpson treated her wedding guests to an awesome 4th of July BBQ -- but they weren't in some random backyard, the group partied at one of California's most exclusive resorts.

The Simpson wedding is set to take place at San Ysidro Ranch in Montecito -- the same place JFK and Jackie O famously honeymooned. The guests celebrated our independence in style yesterday at the Santa Barbara adjacent resort.

The party included karaoke and a performance by a live band.

Anne pimped some of her favorite websites -- girleffect.org. feedingamerica.org and worldofchildren.org -- and Shulman wished everyone a happy 4th. They even gave Andrew Garfield and Emma Stone credit.

Lea Michele stepped out publicly for the first time with her new guy Matthew Paetz ... but the photos look about as genuine as Matthew's claim that he wasn't a gigolo.

The pics show Lea and Matthew, guns out, on a leisurely hike -- and look like classic set up shots pre-planned with photo agencies. They're even wearing matching sneakers.

Our take -- Lea is screaming to the world she doesn't care about Paetz's past -- remember he claims he was only coaching gigolos, not doing the gigoloing himself.

Finally ... we can see Sia.

The "Chandelier" singer -- who notoriously hides from cameras and even goes as far as performing with her back to the audience -- flashed her pearly whites Wednesday night as she walked into Jimmy Kimmel's studio.

Sia -- who once famously masked her face with a paper bag for the cover of Billboard -- was true to form -- for a performance on Kimmel with face paint.

Sia later ... or not.

Lindsay Lohan defied the odds -- she stayed alive long enough to hit 28, but still flashed some serious wear and tear for the big day. Sooo ... happy birthday?

Linds was spotted in NYC with multiple bruises on both legs ... and a serious gash on her left. Maybe she started the celebration early (like it ever stops).

After a rollercoaster year, and life, in and out of sobriety ... a lot of people had her pinned for the 27 Club -- aka the first club Lindsay didn't want to enter.

Infamously, rock legends Brian Jones, Jimi Hendrix, Janis Joplin, Jim Morrison, Kurt Cobain, and Amy Winehouse all died before their 28th birthdays.

Mazel, LiLo.

Shia LaBeouf is NOT in rehab ... but he IS getting treatment for alcohol addiction ... TMZ has learned.

Shia's rep tells us ... reports that he entered a rehab facility are bogus. She says his bizarre conduct over the last few months is symptomatic of a larger health issue -- alcohol addiction -- and he understands it.

It sounds like Shia is in a 12-step program. The rep says "he has taken the first of many necessary steps toward recovery."

We also got pics Tuesday showing Shia carrying an AA book for all to see.

Lana Del Rey has a message for Barrie-James O'Neill ... check out this photo and then get a clue ... WE'VE BROKEN UP!

Lana was in Portofino, Italy, sucking face with Francesco Carrozzini who has directed a bunch of music videos with famous singers like Beyonce and Rita Ora.

Our photog shot O'Neill a week ago at LAX and he told us reports he broke up with his girlfriend of 3 years were B.S.

If O'Neill is right ... Lana is one convincing -- and hot -- liar.

Shia LaBeouf showed strong signs today he's getting help for some kind of substance abuse issue in the wake of his string of bizarre meltdowns.

Shia was in the L.A. area ... clutching an Alcoholics Anonymous book.

We don't know if Shia is just reading up or taking more formal action ... but it would seem there's a connection to his arrest last week after causing a scene at Studio 54 in NYC. As we reported, there have been other -- apparently alcohol-fueled incidents -- at a strip club in New York a week earlier and at a restaurant in L.A. a month ago.

We've reached out for comment about the photos ... so far no word back.

Brittny Gastineau is a glutton for punishment ... strolling with the guy she claims beat her to a pulp just weeks ago.

Brittny and her BF, famed street artist Retna cruised the Century City mall in L.A. Monday ... without the bruises and black eyes that landscaped her face last month after a knock-down, drag-out fight.

Retna's lawyer admits his client did the damage but says Brittny was out of control and it was mutual combat. The lawyer claims Retna was also beat up but no photos ever surfaced showing his injuries.

Jennifer Lopez contorted her body into all sorts of positions this weekend ... rehearsing before her gig at the iHeartRadio Ultimate Pool Party in Miami.

Paul McCartney got a little help from his friend/wife while roasting in the sun.

Paul and Nancy Shevell have been chilling in Ibiza ... where most people are capable of applying sunscreen on their chests without assistance -- but most people aren't Beatles and Knights.

Sure ... 53-year-old Nancy might look kinda like a nursemaid lathering ointment on a patient -- but we're guessing rubbed up 72-year-old Paul ain't complainin'.

Harrison Ford isn't going to let a little broken foot keep him down -- he was spotted in London over the weekend with his banged up limb strapped to a contraption possibly borrowed from C-3PO.

Ford suffered the injury while filming "Star Wars: Episode VII" earlier this month. The injury required surgery, and some say reports say he could be on the shelf for as long as 6 months.

So far Disney is sticking to the release date of December 18, 2015 ... so the 71-year-old will have to heal quickly to stick to the shooting schedule.

Khloe and Kim Kardashian were in a horse race Friday night ... each clearly trying to take the evening with assets that are undeniably spectacular.

Khloe and French Montana got nice and cuddly sailing on the Utopia III in NYC on the Hudson River ... to celebrate K.K.'s 30th birthday ... and her incredible ass clearly made some partiers go full mast.

And then there's Kim ... whose boobs could save perhaps a dozen lives in a nautical emergency.

Oh yeah ...Kris, Kylie and Kendall Jenner were there too.

Now that's a party we could get behind.