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Jessica Simpson rocked a pair of Daisy Dukes in L.A. yesterday ... begging the question, WHY WAS SHE AFRAID TO SHOW OFF HER LEGS IN THAT WEIGHT WATCHERS COMMERCIAL?

Simpson -- who signed a $4 mil deal with WW -- took some serious heat for not flaunting her revamped, slimmed down figure when her first WW commercial aired earlier this month.

But yesterday, Simpson finally showed off the goods during a mid-day shopping trip ... and the goods looked good.

Jess ain't exactly back in the same Daisy Dukes shape she was back in 2005, when she rocked the short shorts in "Dukes of Hazzard" ... but still, progress is progress.

Engaged couple Miley Cyrus and Liam Hemsworth are living life in the fast lane ... by riding around L.A. on Thursday in a $200K McLaren sports car.

While being her personal chauffeur may just be part of the job description, Liam took the driver's seat as Miley and her blonde 'do rode shotgun in the British high performance vehicle.

Miley and Liam's relationship really is going full speed ahead.

Lindsay's bearded homie is Domingo Zapata -- a rich artist who's so tight with Lohan, he permanently leaves a pair of keys for her in NYC to drive his cars whenever she's in town.

The two were seen leaving the Bowery Hotel in NYC earlier today.

TMZ broke the story ... Domingo bought the car roughly 2 months ago from "Real Housewives of Miami" star Karent Sierra ... and she could be on the hook if the alleged victim decides to sue.

The same day she revealed she's pregnant with her first child, Shakira was spotted out wearing a loose fitting black top with her hunky Spanish futbol player boyfriend Gerard Piqué in Barcelona on Wednesday.

While her baby news caused the 35-year-old Colombian pop star to cancel her performance in this weekend's iHeartRadio Music festival, Shakira is all set to replace Christina Aguilera as a coach on "The Voice" next spring.

Honey Boo Boo's daddy Sugar Bear required emergency surgery to treat a nasty infection in a leg wound he suffered during a freak ATV accident last week -- but doctors will NOT have to amputate ... this according to Mama June.

TMZ broke the story ... Sugar Bear sustained the leg injury while mud boggin' -- which is a fancy term for redneck off-roading. He was pictured on crutches following the injury ... but the wound got so infected that he needed to be hospitalized.

Mama June tells TMZ ... doctors decided to perform a debridement -- a surgical procedure to remove infected tissue from the body so it can heal properly.

Mama June, Honey Boo Boo and the rest of the family visited Sugar Bear after the procedure and said he is in good spirits and craving some peanut butter crackers.

June tells TMZ ... doctors expect Sugar Bear to make a full recovery ... and he should be clear to return to work in 4 weeks.

There was talk that Sugar Bear's infection was so bad, docs would have to remove parts of the leg via amputation ... but June says the rumors are "100 percent not true."

Brazilian bombshell Alessandra Ambrosio proved she's back in supermodel shape by showing of her flat stomach in L.A. on Monday ... four months after giving birth to her second child on May 7th.

The 31-year-old Victoria's Secret Angel has a lot in common with 32-year-old new mom Jessica Simpson ... as Alessandra had her baby just six days after Jess, who gave birth on May 1st.

Call him Ass Ventura.

Jim Carrey hit the beach in Malibu this weekend with a brand new thongtastic bikini chick ... just a short time after reportedly breaking things off with his last GF -- 23-year-old Anastasia Vitkina.

50-year-old Carrey is a LEGEND on the Hollywood dating scene ... cycling through stunners like Jenny McCarthy, January Jones, Renee Zellweger and Lauren Holly.

"Teen Mom" star Catelynn Lowell -- the girl who gave her baby up for adoption on the show -- got into some serious HIGH jinks this summer, ripping a massive bong at a party with friends.

The photo -- obtained by TMZ -- tells the story. It was snapped last month at a friend's get-together in Michigan -- showing Catelynn in rolled up jeans, igniting some sizable glassware ... and taking a big ol' hit.

Catelynn could've been the one "Teen Mom" star who ever appeared responsible and smart.

Past tense.

Heidi Klum and her bodyguard/boyfriend Martin Kirsten were spotted this morning leaving the Beverly Hills Hotel after having breakfast together.

Heidi told Katie Couric this week that the two are "seeing" each other -- but despite Seal's claims, the relationship began after she split from him.

On her last trip to NYC, Heidi used a different bodyguard, giving her man the day off.

Yeah, Mark Sanchez and Eva Longoria are definitely doing it.

The freshly-minted couple left the Ritz-Carlton in NYC for a late night dinner at the uber-fancy French restaurant Daniel.

The New York Jets QB is 25 -- she's 37.

Having just divorced another professional athlete -- NBA star Tony Parker -- Eva's clearly got a thing. As for Sanchez, he was previously banging 20-year-old Kate Upton.

So we gotta ask ...

Heidi Klum's boyfriend -- formerly known as "The Help" -- was pulled over in L.A. earlier today ... after cops caught him doing the same thing everyone in L.A. does all the time ... texting while driving.

TMZ has learned ... Martin Kristen was pulled over on the 405 Freeway near the Sunset exit ... after a California Highway Patrol officer noticed the guy texting while driving a black Mercedes Benz passenger van.

Cops tell us Martin was cited and sent on his way.

We're told Heidi was NOT in the car at the time of the incident ... and obviously, neither was Seal.

Stacy Keibler doused herself in George Clooney repellent yesterday, trying on a giant yellow diamond ring designed by Jacob Arabo ... aka Jacob the Jeweler, jeweler of the stars.

Clooney, the world's most infamous bachelor, has long maintained he will never get married again (he was married for a few years to actress Talia Balsam).

His last girlfriend, Elisabetta Canalis, told an Italian magazine in 2009 that she hoped to be a bride someday. Less than two weeks later, they broke up.

A source close to Stacy says don't read too much into the pics -- it was just an event, and Stacy was asked by Jacob to wear the ring.

But on her left hand?

Honey Boo Boo's papa Mike "Sugar Bear" Thompson got himself a boo boo of his own yesterday... busting up his foot in a freak "mud boggin'" accident ... TMZ has learned.

For you city folk out there -- "mud boggin'" is basically when you take an off-road vehicle and race it through the mud. It's pretty awesome ... in a redneck sorta way.

Sugar Bear was boggin' his ATV at the time of the accident -- it's unclear if Sugar Bear broke any bones in the wreck ... but he was spotted rockin' a fresh pair of crutches outside of his Georgia home yesterday.

BTW -- nice pants.

Of course, an accident was bound to happen -- Sugar Bear and his buddies get up to some pretty insane ATV shenanigans ... just check this clip.

Amanda Bynes was driving aimlessly for hours Tuesday ... while smoking out of what appears to be a marijuana pipe and tooling around L.A. on a suspended license.

The photos -- obtained by TMZ -- show Bynes taking multiple hits out of a pipe that is designed to look like a cigarette lighter in your car.

In one shot, you see what appears to be remnants of marijuana in a cup holder. Some of the nugs appear burnt -- as if they had already been smoked.

The car is a mess. Trash is strewn everywhere. There are stains on the seat, empty bottles, dog hair and various other items.

Amanda started her journey at Baja Fresh in the San Fernando Valley, where she smoked from the pipe in the restaurant parking lot and ate tacos. She then went to a spa, where she spent 3 hours. We're told Amanda then drove without purpose for several hours, sometimes cutting off other drivers and violating various traffic laws. Amanda ended up at Home Depot, where she again took a hit from the pipe in the parking lot.

TMZ has confirmed ... Amanda is driving illegally, because the DMV suspended her license on August 25. As for why her license was yanked, we believe it's because she refused to take a sobriety test when she was busted for DUI in April. In California, such refusal results in automatic license suspension.

TMZ broke the story ... Amanda has been charged with 2 hit-and-runs and various drivers have complained that she has either hit them as well or created peril.

7:19 AM PT -- We now know what Amanda was buying at Home Depot -- multi-colored light bulbs ... including a pink one.

The 27-year-old mother of one is very, very good for the environment.